{"id":1707,"date":"2024-09-23T09:38:31","date_gmt":"2024-09-23T09:38:31","guid":{"rendered":"https:\/\/phamho.com\/book\/?p=1707"},"modified":"2024-09-23T09:40:16","modified_gmt":"2024-09-23T09:40:16","slug":"theme-5-physical-world","status":"publish","type":"post","link":"https:\/\/phamho.com\/book\/theme-5-physical-world\/","title":{"rendered":"Theme 5 &#8211; Physical World"},"content":{"rendered":"\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>Theme 5 &#8211; Physical World<\/title>\n    <style>\n        \/* Reset and Base Styles *\/\n        * {\n            box-sizing: border-box;\n        }\n\n        body {\n            font-family: Arial, sans-serif;\n            background-color: #ffffff;\n            margin: 0;\n            padding: 0;\n            display: flex;\n            flex-direction: column; \/* Stack elements vertically by default *\/\n            min-height: 100vh;\n        }\n\n        \/* Menu Styles *\/\n        .menu {\n            width: 100%;\n            background-color: #2e86de; \/* Blue for education *\/\n            padding: 10px; \/* Slightly increased padding for touch *\/\n            text-align: center;\n            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);\n            margin-bottom: 10px; \/* Reduced margin for better spacing *\/\n            overflow-x: auto;\n            white-space: nowrap;\n        }\n        .menu a {\n            color: #fff;\n            text-decoration: none;\n            margin: 0 10px; \/* Increased margin for better touch targets *\/\n            font-weight: bold;\n            font-size: 14px; \/* Slightly increased font for readability *\/\n            display: inline-block;\n        }\n        .menu a:hover,\n        .menu a:focus {\n            text-decoration: underline;\n            outline: 2px dashed #fff;\n            outline-offset: 4px;\n        }\n\n        \/* Container Styles *\/\n        .container {\n            display: flex;\n            flex-direction: column; \/* Stack elements vertically on mobile *\/\n            align-items: center;\n            padding: 10px; \/* Increased padding for better spacing *\/\n            box-sizing: border-box;\n            flex: 1 0 auto;\n            width: 100%;\n        }\n\n        \/* Image and Chat Containers *\/\n        .image-chat-wrapper {\n            display: flex;\n            flex-direction: column;\n            width: 100%;\n            max-width: 800px; \/* Increased max-width for landscape *\/\n            flex: 1;\n        }\n\n        \/* Image Container Styles *\/\n        .image-container {\n            flex: 1;\n            text-align: center;\n            margin-bottom: 15px; \/* Reduced margin *\/\n        }\n        .image-container img {\n            width: 100%;\n            height: auto;\n            max-height: 300px; \/* Set a maximum height *\/\n            object-fit: cover;\n            border-radius: 15px; \/* Reduced border-radius *\/\n            box-shadow: 0 0 8px rgba(0, 0, 0, 0.1); \/* Reduced shadow *\/\n        }\n        .sentence-text {\n            margin: 10px 0; \/* Increased margin for better spacing *\/\n            font-weight: bold;\n            color: #333;\n            font-size: 16px; \/* Increased font size for readability *\/\n        }\n        .word-box {\n            margin-top: 10px; \/* Increased margin *\/\n            padding: 10px; \/* Increased padding *\/\n            background-color: #fff;\n            border: 2px solid #2e86de; \/* Updated border color *\/\n            border-radius: 8px; \/* Reduced border-radius *\/\n            box-shadow: 0 0 8px rgba(0, 0, 0, 0.1); \/* Reduced shadow *\/\n            font-size: 16px; \/* Maintain readability *\/\n            font-weight: bold;\n            color: #2e86de; \/* Updated text color *\/\n            text-align: left;\n            max-height: 250px; \/* Maintain max-height *\/\n            overflow-y: auto;\n        }\n\n        \/* Chat Container Styles *\/\n        .chat-container {\n            background-color: #2e86de; \/* Updated color *\/\n            border-radius: 15px; \/* Reduced border-radius *\/\n            box-shadow: 0 0 8px rgba(0, 0, 0, 0.1); \/* Reduced shadow *\/\n            overflow: hidden;\n            display: flex;\n            flex-direction: column;\n            height: auto; \/* Removed fixed height *\/\n            max-height: 500px; \/* Set a reasonable max-height *\/\n            flex: 1;\n        }\n        .chat-header {\n            background-color: #1b4f72; \/* Darker shade for header *\/\n            color: #fff;\n            padding: 12px; \/* Increased padding for better touch *\/\n            text-align: center;\n            border-bottom: 1px solid #0e2143; \/* Updated border color *\/\n        }\n        .chat-header h2 {\n            margin: 0;\n            font-size: 18px; \/* Increased font size for readability *\/\n        }\n        .chat-messages {\n            padding: 12px; \/* Increased padding *\/\n            overflow-y: auto;\n            flex: 1;\n            background-color: #fff;\n            max-height: 300px; \/* Maintain max-height *\/\n        }\n        .message {\n            margin-bottom: 10px; \/* Increased margin *\/\n            padding: 10px; \/* Increased padding *\/\n            border-radius: 6px; \/* Slightly increased border-radius *\/\n            font-size: 14px; \/* Increased font size for readability *\/\n            line-height: 1.5;\n        }\n        .user-message {\n            background-color: #27ae60;\n            color: #fff;\n            text-align: right;\n        }\n        .bot-message {\n            background-color: #2980b9;\n            color: #fff;\n            text-align: left;\n        }\n\n        \/* Chat Input Styles *\/\n        .chat-input {\n            display: flex;\n            align-items: center;\n            background-color: #a3e106;\n            padding: 10px; \/* Increased padding *\/\n            justify-content: space-between;\n        }\n        .send-button, .stop-button {\n            background-color: #17c686;\n            color: #fff;\n            font-weight: bold;\n            border: none;\n            border-radius: 5px;\n            padding: 12px 16px; \/* Increased padding for touch *\/\n            cursor: pointer;\n            transition: background-color 0.3s;\n            flex: 1;\n            margin: 0 6px; \/* Increased margin for better spacing *\/\n            max-width: 150px; \/* Increased max-width for longer labels *\/\n            font-size: 16px; \/* Increased font size for readability *\/\n        }\n        .stop-button {\n            background-color: #c86722;\n        }\n        .send-button:hover,\n        .stop-button:hover,\n        .send-button:focus,\n        .stop-button:focus {\n            background-color: #45a049;\n            outline: none;\n        }\n\n        \/* Loader Styles *\/\n        .loader {\n            border: 4px solid #f3f3f3;\n            border-top: 4px solid #2980b9; \/* Updated color *\/\n            border-radius: 50%;\n            width: 20px;\n            height: 20px;\n            animation: spin 2s linear infinite;\n            display: inline-block;\n            margin-left: 10px;\n        }\n\n        @keyframes spin {\n            0% { transform: rotate(0deg); }\n            100% { transform: rotate(360deg); }\n        }\n\n        \/* Responsive Design Adjustments *\/\n\n        \/* Portrait Mode *\/\n        @media (orientation: portrait) {\n            .image-chat-wrapper {\n                flex-direction: column;\n            }\n            .image-container, .chat-container {\n                width: 100%;\n                max-width: 100%;\n            }\n        }\n\n        \/* Landscape Mode *\/\n        @media (orientation: landscape) and (min-width: 600px) {\n            .image-chat-wrapper {\n                flex-direction: row;\n                justify-content: space-between;\n            }\n            .image-container, .chat-container {\n                width: 48%;\n                max-width: 48%;\n            }\n            .word-box {\n                max-height: 200px;\n            }\n            .chat-header h2 {\n                font-size: 20px;\n            }\n            .message {\n                font-size: 15px;\n            }\n            .send-button, .stop-button {\n                font-size: 18px;\n                padding: 14px 20px;\n                max-width: 200px;\n            }\n        }\n\n        \/* General Mobile Responsiveness *\/\n        @media (max-width: 768px) {\n            .chat-header h2 {\n                font-size: 16px;\n            }\n            .message {\n                font-size: 14px;\n            }\n            .send-button, .stop-button {\n                font-size: 16px;\n                padding: 12px 16px;\n                max-width: 150px;\n            }\n            .word-box {\n                font-size: 15px;\n            }\n        }\n\n        \/* Samsung Android Specific Adjustments *\/\n        @media only screen and (max-device-width: 480px) and (-webkit-min-device-pixel-ratio: 2) {\n            \/* Adjust font sizes and button sizes for high-density screens *\/\n            .chat-header h2 {\n                font-size: 18px; \/* Increased font size *\/\n            }\n            .send-button, .stop-button {\n                padding: 14px 18px; \/* Adjusted padding *\/\n                font-size: 16px; \/* Adjusted font size *\/\n            }\n            .message {\n                font-size: 14px; \/* Adjusted font size *\/\n            }\n            .word-box {\n                font-size: 16px; \/* Adjusted font size *\/\n            }\n            .chat-input input {\n                font-size: 16px; \/* Adjusted font size *\/\n            }\n        }\n    <\/style>\n<\/head>\n<body>\n    <div class=\"menu\">\n      <a href=\"https:\/\/phamho.com\/book\/2024\/09\/23\/theme-1-systems-of-education\/\">Systems of education<\/a>\n        <a href=\"https:\/\/phamho.com\/book\/2024\/09\/23\/theme-2-psychology-and-sociology\/\">Psychology and sociology<\/a>\n        <a href=\"https:\/\/phamho.com\/book\/2024\/09\/23\/theme-3-work-business\/\">Work &#038; Business<\/a>\n        <a href=\"https:\/\/phamho.com\/book\/2024\/09\/23\/theme-4-science-and-nature\/\">Science and Nature<\/a>\n        <a href=\"https:\/\/phamho.com\/book\/2024\/09\/23\/theme-5-physical-world\/\">Physical World<\/a>\n    <\/div>\n\n    <div class=\"container\">\n        <div class=\"image-chat-wrapper\">\n            <div class=\"image-container\">\n                <img decoding=\"async\" src=\"https:\/\/phamho.com\/book\/wp-content\/uploads\/2024\/09\/DALL\u00b7E-2024-09-23-16.19.55-A-futuristic-classroom-setting-where-a-robot-is-teaching-an-IELTS-speaking-class.-The-robot-stands-at-the-front-of-the-room-gesturing-toward-a-digita.webp\" alt=\"Lesson Teacher\">\n                <div class=\"sentence-text\">Look at the sentences in this box<\/div>\n                <div id=\"word-box\" class=\"word-box\">\n                    <!-- Learned education-related sentences and answers will be displayed here -->\n                <\/div>\n            <\/div>\n            <div class=\"chat-container\">\n                <div class=\"chat-header\">\n                    <h2>Theme 5 &#8211; Physical World<\/h2>\n                <\/div>\n                <div class=\"chat-messages\" id=\"chat-messages\">\n                    <!-- Messages will appear here -->\n                <\/div>\n                <div class=\"chat-input\">\n                    <!-- Removed input field as per previous iterations; if needed, it can be re-added -->\n                    <button id=\"start-btn\" class=\"send-button\" aria-label=\"Start Lesson\">Start<\/button>\n                    <button id=\"stop-btn\" class=\"stop-button\" aria-label=\"Stop Lesson\">Stop<\/button>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <script>\n    \/\/ Define the questions with expected keywords and model answers\n    const questions = [\n        { \n            english: \"Where is your country?\", \n            keywords: [\"country\", \"location\", \"continent\", \"neighbors\", \"geography\"],\n            answer: \"My country is located in Southeast Asia, bordered by Thailand to the north and the Gulf of Thailand to the south.\"\n        },\n        { \n            english: \"What are the big cities in your country?\", \n            keywords: [\"big cities\", \"capital\", \"metropolitan\", \"urban areas\"],\n            answer: \"Some of the big cities in my country include Bangkok, Chiang Mai, Phuket, and Pattaya. Bangkok is the capital and the largest city.\"\n        },\n        { \n            english: \"What is the weather like in your country?\", \n            keywords: [\"weather\", \"climate\", \"seasons\", \"temperature\", \"rainy\", \"dry\"],\n            answer: \"The weather in my country is tropical, with a distinct rainy season from May to October and a dry season from November to April. Temperatures are generally warm throughout the year.\"\n        },\n        { \n            english: \"What does your country look like?\", \n            keywords: [\"appearance\", \"landscape\", \"geography\", \"natural features\", \"urban\"],\n            answer: \"My country boasts a diverse landscape, including lush jungles, beautiful beaches, and bustling urban centers. There are also mountainous regions and extensive river systems.\"\n        },\n        { \n            english: \"Which countries border your country now? On which sides?\", \n            keywords: [\"border\", \"neighboring countries\", \"direction\", \"southeast Asia\"],\n            answer: \"My country is bordered by Thailand to the north, Laos to the northeast, Cambodia to the southeast, and Malaysia to the south.\"\n        },\n        { \n            english: \"How many regions are there in your country? What are they?\", \n            keywords: [\"regions\", \"administrative divisions\", \"areas\", \"geographical regions\"],\n            answer: \"There are four main regions in my country: the Northern Region, Central Region, Eastern Region, and Southern Region. Each region has its unique cultural and geographical characteristics.\"\n        },\n        { \n            english: \"Do you like living in your country? Why?\", \n            keywords: [\"living\", \"country\", \"preference\", \"reasons\", \"advantages\"],\n            answer: \"Yes, I enjoy living in my country because of its rich cultural heritage, friendly people, and beautiful natural landscapes. The cost of living is also relatively affordable.\"\n        },\n        { \n            english: \"What city is the most beautiful in your country? Why?\", \n            keywords: [\"most beautiful city\", \"reasons\", \"attractions\", \"scenery\"],\n            answer: \"Chiang Mai is the most beautiful city in my country. It is surrounded by mountains and lush greenery, and it has a vibrant cultural scene with many temples and festivals.\"\n        },\n        { \n            english: \"Where is your hometown located?\", \n            keywords: [\"hometown\", \"location\", \"description\", \"geographical details\"],\n            answer: \"My hometown is located in the Northern Region of my country, nestled between two rivers and surrounded by rolling hills and forests.\"\n        },\n        { \n            english: \"Is it easy to visit around your hometown?\", \n            keywords: [\"visit\", \"hometown\", \"accessibility\", \"transportation\", \"tourism\"],\n            answer: \"Yes, it's easy to visit around my hometown. There are good transportation links, including buses and trains, and plenty of tourist attractions nearby.\"\n        }\n    ];\n\n    \/\/ Define positive, constructive, and pronunciation feedback arrays\n    const positiveFeedback = [\n        \"Great job!\",\n        \"Well done!\",\n        \"Excellent response!\",\n        \"Very well.\",\n        \"Your answer was clear and concise.\",\n        \"Fantastic!\",\n        \"You're doing great!\",\n        \"That's a good answer.\"\n    ];\n\n    const constructiveFeedback = [\n        \"Try to include more details related to the question.\",\n        \"Could you provide more specific information?\",\n        \"Consider mentioning related activities or reasons.\",\n        \"Adding relevant keywords can improve your answer.\",\n        \"Think about elaborating on your response.\",\n        \"Including examples would be helpful.\",\n        \"Try to relate your answer to the topic more closely.\",\n        \"Expanding your answer will make it better.\",\n        \"Providing more context can enhance your response.\",\n        \"Think about why or how to add depth to your answer.\"\n    ];\n\n    \/\/ Define pronunciation feedback messages\n    const pronunciationFeedback = [\n        \"Your pronunciation is clear, but try to emphasize key words for better clarity.\",\n        \"Good job! To improve, pay attention to the pronunciation of 'Thailand' and 'tropical'.\",\n        \"Well spoken! Consider slowing down to ensure each word is pronounced accurately.\",\n        \"Excellent! For even better clarity, try to articulate 'metropolitan' more distinctly.\",\n        \"Great effort! Focus on the 'th' sound in words like 'weather' and 'this'.\"\n    ];\n\n    \/\/ Define stop keywords\n    const stopKeywords = [\"goodbye\", \"good bye\", \"bye\", \"bye-bye\", \"byebye\"];\n\n    let currentQuestionIndex = 0;\n    let recognition;\n\n    const speechSynthesisSupported = 'speechSynthesis' in window;\n    const speechRecognitionSupported = window.SpeechRecognition || window.webkitSpeechRecognition;\n\n    let voices = [];\n\n    function loadVoices() {\n        voices = window.speechSynthesis.getVoices();\n        if (voices.length === 0) {\n            \/\/ Some browsers load voices asynchronously\n            window.speechSynthesis.onvoiceschanged = () => {\n                voices = window.speechSynthesis.getVoices();\n                console.log(\"Voices loaded:\", voices);\n            };\n        } else {\n            console.log(\"Voices loaded:\", voices);\n        }\n    }\n\n    loadVoices();\n\n    window.onload = function() {\n        if (speechSynthesisSupported) {\n            \/\/ Delay greeting to ensure voices are loaded\n            setTimeout(() => greetUser(), 500); \n        } else {\n            appendMessage(\"Sorry, your browser does not support speech synthesis.\", \"bot\");\n        }\n\n        if (!speechRecognitionSupported) {\n            appendMessage(\"Sorry, your browser does not support speech recognition.\", \"bot\");\n        }\n\n        \/\/ Handle Start Button Click\n        document.getElementById('start-btn').onclick = function() {\n            if (!speechSynthesisSupported) {\n                appendMessage(\"Speech synthesis is not supported in your browser.\", \"bot\");\n                return;\n            }\n            if (speechRecognitionSupported) {\n                currentQuestionIndex = 0;\n                clearWordBox();\n                startLesson();\n            } else {\n                appendMessage(\"Speech recognition is not supported in your browser.\", \"bot\");\n            }\n        };\n\n        \/\/ Handle Stop Button Click\n        document.getElementById('stop-btn').onclick = function() {\n            if (recognition) {\n                recognition.stop();\n            }\n            endLesson(true);\n        };\n    };\n\n    function greetUser() {\n        const greeting = \"Hello! Welcome to the Practice Speaking about the Physical World. In this lesson, you will listen to each question carefully and provide your own answers. After each response, the correct answer will be displayed in the box. Additionally, I'll provide some tips to help improve your pronunciation. Are you ready? Click Start to begin the lesson!\";\n        appendMessage(greeting, 'bot');\n        sayText(greeting, \"en-US\");\n    }\n\n    function startLesson() {\n        if (currentQuestionIndex < questions.length) {\n            const question = questions[currentQuestionIndex];\n            const questionNumber = currentQuestionIndex + 1;\n            const questionText = `Question ${questionNumber}: '${question.english}'`;\n\n            appendMessage(questionText, 'bot');\n            addSentenceToBox(`Q${questionNumber}: ${question.english}`); \/\/ Add question to word box\n            sayText(`Question ${questionNumber}: ${question.english}`, \"en-US\");\n\n            \/\/ Listen for user response after a short delay to ensure the question has been spoken\n            setTimeout(() => listenUserResponse(question), 5000);\n        } else {\n            endLesson();\n        }\n    }\n\n    function listenUserResponse(question) {\n        recognition = new (window.SpeechRecognition || window.webkitSpeechRecognition)();\n        recognition.lang = 'en-US';\n        recognition.interimResults = false;\n        recognition.maxAlternatives = 1;\n\n        recognition.start();\n\n        recognition.onresult = function(event) {\n            let userInput = event.results[0][0].transcript.trim();\n            userInput = normalizeAndFormatUserInput(userInput);  \/\/ Normalize input and format\n            appendMessage(userInput, 'user');\n\n            \/\/ Check for stop keywords\n            if (checkStopKeywords(userInput.toLowerCase())) {\n                endLesson(true);\n                return;\n            }\n\n            \/\/ Analyze user input for keywords\n            const feedbackType = analyzeResponse(userInput, question.keywords);\n\n            if (feedbackType === \"positive\") {\n                const positiveMessage = positiveFeedback[Math.floor(Math.random() * positiveFeedback.length)];\n                appendMessage(positiveMessage, 'bot');\n                sayText(positiveMessage, 'en-US');\n            } else if (feedbackType === \"pronunciation\") {\n                const pronunciationMessage = pronunciationFeedback[Math.floor(Math.random() * pronunciationFeedback.length)];\n                appendMessage(pronunciationMessage, 'bot');\n                sayText(pronunciationMessage, 'en-US');\n            } else {\n                const constructiveMessage = constructiveFeedback[Math.floor(Math.random() * constructiveFeedback.length)];\n                appendMessage(constructiveMessage, 'bot');\n                sayText(constructiveMessage, 'en-US');\n            }\n\n            \/\/ Display the model answer in the word box without speaking it\n            const modelAnswer = `Answer: ${question.answer}`;\n            addSentenceToBox(modelAnswer);\n            \/\/ Removed: sayText(`Your answer should be: ${question.answer}`, \"en-US\");\n\n            currentQuestionIndex++; \/\/ Move to next question\n            setTimeout(startLesson, 3000); \/\/ Ask next question after 3 seconds\n        };\n\n        recognition.onspeechend = function() {\n            recognition.stop();\n        };\n\n        recognition.onerror = function(event) {\n            appendMessage('Error: ' + event.error, 'bot');\n            const retryMessage = \"Let's try that question again.\";\n            appendMessage(retryMessage, 'bot');\n            sayText(retryMessage, 'en-US');\n            setTimeout(() => askSameQuestion(question), 3000); \/\/ Retry the same question\n        };\n    }\n\n    function askSameQuestion(question) {\n        const questionNumber = currentQuestionIndex + 1;\n        const questionText = `Let's try again: '${question.english}'`;\n\n        appendMessage(questionText, 'bot');\n        sayText(`Question ${questionNumber}: ${question.english}`, \"en-US\");\n\n        addSentenceToBox(`Q${questionNumber}: ${question.english}`); \/\/ Re-add question to word box\n        setTimeout(() => listenUserResponse(question), 5000); \/\/ Listen to the response again\n    }\n\n    function analyzeResponse(userInput, keywords) {\n        \/\/ Convert user input to lowercase for case-insensitive matching\n        const lowerCaseInput = userInput.toLowerCase();\n\n        \/\/ Check if any keyword is present in the user input\n        for (let keyword of keywords) {\n            if (lowerCaseInput.includes(keyword.toLowerCase())) {\n                \/\/ Simulate pronunciation feedback for specific keywords\n                if (keyword.toLowerCase().includes(\"thailand\") || keyword.toLowerCase().includes(\"tropical\")) {\n                    return \"pronunciation\";\n                }\n                return \"positive\";\n            }\n        }\n\n        return \"constructive\";\n    }\n\n    function checkStopKeywords(userInput) {\n        \/\/ Build a regex pattern with word boundaries and ignore case\n        let pattern = new RegExp('\\\\b(' + stopKeywords.join('|') + ')\\\\b', 'i');\n        return pattern.test(userInput);\n    }\n\n    function normalizeAndFormatUserInput(text) {\n        \/\/ Replace \"i\" with \"I\" and capitalize the first letter of the sentence\n        let normalized = text.replace(\/\\bi\\b\/g, \"I\");\n\n        \/\/ Format the sentence: capitalize first letter, add a period or question mark as needed\n        return formatSentence(normalized);\n    }\n\n    function formatSentence(text) {\n        \/\/ Capitalize the first letter\n        text = text.charAt(0).toUpperCase() + text.slice(1);\n\n        \/\/ Check if it's a question or a statement\n        const questionWords = ['who', 'what', 'where', 'when', 'why', 'how', 'is', 'are', 'do', 'does', 'can', 'should', 'will', 'would'];\n        const firstWord = text.split(\" \")[0].toLowerCase();\n\n        \/\/ Add question mark if it's a question, otherwise add a period\n        if (questionWords.includes(firstWord) && !text.endsWith('?')) {\n            text += '?';\n        } else if (!text.endsWith('.') && !text.endsWith('?')) {\n            text += '.';\n        }\n\n        return text;\n    }\n\n    function addSentenceToBox(sentence) {\n        const wordBox = document.getElementById('word-box');\n        const sentenceElement = document.createElement('div');\n        sentenceElement.innerText = sentence;\n        wordBox.appendChild(sentenceElement);\n        wordBox.scrollTop = wordBox.scrollHeight;\n    }\n\n    function clearWordBox() {\n        const wordBox = document.getElementById('word-box');\n        wordBox.innerHTML = \"\";\n    }\n\n    function endLesson(userStopped = false) {\n        \/\/ Cancel any ongoing speech synthesis\n        if (speechSynthesisSupported) {\n            window.speechSynthesis.cancel();\n        }\n\n        let message;\n        if (userStopped) {\n            message = \"Thank you for practicing! Goodbye!\";\n        } else {\n            message = \"Well done! You've completed all the questions. Keep practicing!\";\n        }\n        appendMessage(message, \"bot\");\n        sayText(message, \"en-US\");\n    }\n\n    function sayText(text, lang, callback) {\n        if (!speechSynthesisSupported) {\n            if (callback) callback();\n            return;\n        }\n        const utterance = new SpeechSynthesisUtterance(text);\n        utterance.lang = lang;\n        utterance.rate = 1.0;\n        utterance.pitch = 1.0;\n\n        \/\/ Select the voice once voices are loaded\n        if (voices.length === 0) {\n            \/\/ If voices are not loaded yet, wait for them\n            window.speechSynthesis.onvoiceschanged = () => {\n                voices = window.speechSynthesis.getVoices();\n                selectVoice(utterance, lang);\n                utterance.onend = function() {\n                    if (callback) callback();\n                };\n                window.speechSynthesis.speak(utterance);\n            };\n        } else {\n            selectVoice(utterance, lang);\n            utterance.onend = function() {\n                if (callback) callback();\n            };\n            window.speechSynthesis.speak(utterance);\n        }\n    }\n\n    function selectVoice(utterance, lang) {\n        \/\/ Prioritize specific high-quality voices available on Android\n        const preferredVoiceNames = [\n            'Google US English',\n            'Google UK English Female',\n            'Google UK English Male',\n            'Google US English Female',\n            'Google US English Male'\n        ];\n\n        \/\/ Try to find a preferred voice first\n        let selectedVoice = voices.find(voice => preferredVoiceNames.includes(voice.name));\n\n        \/\/ If no preferred voice is found, fallback to any 'en-US' voice\n        if (!selectedVoice) {\n            selectedVoice = voices.find(voice => voice.lang === lang && voice.name.toLowerCase().includes('english')) ||\n                            voices.find(voice => voice.lang.startsWith('en'));\n        }\n\n        if (selectedVoice) {\n            utterance.voice = selectedVoice;\n            console.log(`Selected voice: ${selectedVoice.name}`);\n        } else {\n            console.warn(\"No suitable English voice found. Using default voice.\");\n        }\n    }\n\n    function appendMessage(text, sender) {\n        const messageContainer = document.getElementById('chat-messages');\n        const messageElement = document.createElement('div');\n        messageElement.classList.add('message');\n        messageElement.classList.add(sender === 'bot' ? 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