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Hiện tượng nào sau đây không liên quan đến phản xạ âm? A. Đo độ sâu của biển bằng siêu âm. B. Trong y học, dùng máy siêu âm để khám bệnh. C. Nói chuyện qua điện thoại. D. Cá heo, dơi phát ra siêu âm và nhờ âm phản xạ để tìm kiếm thức ăn. Người ta sử dụng sự phản xạ của siêu âm để xác định độ sâu của đáy biển. Giả sử tàu ở trên mặt biển phát ra siêu âm truyền trong nước thẳng xuống đáy biển với vận tốc 1500m/s và thu được âm phản xạ của nó từ đáy biển sau 3,6 giây kể từ lúc phát ra siêu âm. Độ sâu của đáy biển là A. 2,7 km. B. 5400 m. C. 5,4 km. D. 270 m. Một vận động viên bắn súng bắn một phát đạn vào bia cách chỗ người đó đứng là 680m. Thời gian từ lúc bắn đến lúc người đó nghe thấy tiếng nổ là 2,68 s. Biết vận tốc truyền âm trong không khí là 340 m/s. Vận tốc của viên đạn khi đó là A. 1000 m/s B. 507,5 m/s C. 500 m/s. D. 1020 m/sMột số loài cá rất nhạy với những âm có tần số lớn. Các tàu đánh cá hiện đại thường dùng một loại máy đặc biệt gọi là “máy tầm ngư”. Khi thả xuống nước máy này sẽ phát ra những âm thanh đặc biệt có thể “gọi” được một số loài cá tập trung về chỗ đặt máy. Âm do máy phát ra là A. âm có tần số lớn hơn 20000 Hz. B. âm mà tai người nghe được. C. âm có tần số nhỏ hơn 16 Hz. D. âm có tần số từ 16Hz tới 20kHz.

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làm EX12. Viết lại câu, sử dụng cấu trúc so sánh “as…as”. 1. My doll is pretty but her doll is prettier than mine. => My doll ________________________________________________________. 2. Travelling by train is quite exciting but travelling by plane is more exciting. => Travelling by train => ____________________________________________. 3. My salary is high, but my husband’s is higher. =>My salary ______________________________________________________. 4. I am disappointed about my team’s score. Ann is disappointed too. => I___________________________________________________________. 5. It’s warm today, but it was much warmer yesterday. => Today it ________________________________________________________. 6. I still feel a bit tired, but I am better than yesterday. => I don’t feel ______________________________________________________. 7. Tom’s essay is very good and mine is good too. => Tom’s essay _____________________________________________________. 8. The Smiths have lived here for quite a long time, but we’ve lived here longer. => The Smiths haven’t _______________________________________________. EX13. Hoàn thành câu sử dụng câu đồng tình với “too/ either” sao cho nghĩa của câu không thay đổi. 1. My grandfaher worked for a tobacco company. My father also worked for a tobacco company. My grandfather worked for a tobacco company and my father ______________________. 2. Both my father and my mother aren’t Vietnamese. My father isn’t Vietnamese and my mother ______________________________________. 3. I fancy classical music and my brother also fancies classical music. I fancy classical music _______________________________________________________. 4. Reading books is as relaxing as listening to music. Reading books is relaxing and listening to music __________________________________. 5. My friend and I didn’t go to the concert last night. My friend didn’t go to the concert last night and I _________________________________. 6. My parents and my teacher won’t allow me to play truant. My parents won’t allow me to play truant and my teacher ___________________________. 7. I am never good at singing and paiting. I am never good at singing and I _______________________________________________. 8. Both my brother and I rarely listen to traditional songs. I rarely listen to traditional songs and my brother __________________________________.

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nhanh EX10. Dùng các từ cho sẵn, viết câu so sánh với “as…as” hoặc “the same…as”. movies hard tasty valuable origin fast long songs talent clothes 1. Can I borrow your ladder? My ladder isn’t ______________ yours. 2. Your cake is delicious. My cake isn’t ______________ yours. 3. None of Tom’s friends has ______________ him. 4. Both of us fancy rock music. She listens to ______________ me. 5. Jim likes ______________ Tom, and they often watch together. 6. Life nowadays isn’t ______________ it used to be. People now live more comfortably. 7. Her ring is not ______________ her necklace. 8. My cat has ______________ yours. They both come from Russia. 9. Kim bought ______________ her sister. They want to look like twins. 10. You should go home ______________ you can. Your mom is looking for you everywhere. EX11. Viết lại câu, sử dụng cấu trúc so sánh “the same…as”. 1. My brother and I both have big brown eyes. =>; _______________________________________________________________. 75 2. My favourite subject is Math. Tim likes Math too. =>; _______________________________________________________________. 3. I have a problem with this exercise. Peter has a problem with it too. =>; _______________________________________________________________. 4. Louis and James are both 18 years old. =>; _______________________________________________________________. 5. I went to my local primary school. Jim went to my local primary school too. =>; _______________________________________________________________. 6. You and I both have dark brown hair. =>; _______________________________________________________________. 7. I left the meeting room at 11 a.m and so did you. =>; _______________________________________________________________. 8. My birthday is 5 April. Tom’s birthday is 5 April too. =>; _______________________________________________________________.

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Nhanh lên khoảng 45 p nx Làm hết + Giải thik EX6. Điền “too/ either” vào chỗ trống để hoàn thành câu. 1. My father is a musician. I am a musician __________. 2. I don’t like the smell of durian. My sister doesn’t like it __________. 3. I can’t wait to meet my parents and my sister can’t__________. 4. My favourite comedian is Rowan Atkinson. His favourite comedian is Rowan Atkinson__________. 5. My father loves watching football matches on TV and I love it__________. 6. My mother can’t open the jar and I can’t__________. 7. Jim should go to bed now and you should go to bed __________. 8. Your sister mustn’t skip breakfast and you mustn’t __________. 9. I find action movies so interesting and James finds them interesting __________. 10. Studying Math isn’t easy for me and studying English isn’t __________. EX7. Viết câu đồng tình với “too/ either” trong những câu cho sẵn sau đây. 0. “I am not hungry now.” =>“I am not hungry either.” 1. “They are my favourite footballers.” => “___________________________________________________________.” 2. “I want to be a good student.” => “___________________________________________________________.” 3. “I won’t come to his party.” => “___________________________________________________________.” 4. “It is not my pencil.” => “___________________________________________________________.” 5. “She will never forgive me.” => “___________________________________________________________.” 6. “I really admire him.’ 74 => “___________________________________________________________.” 7. “Yesterday I couldn’t sleep.” => “___________________________________________________________.” 8. ‘I am not working on my project.” => “___________________________________________________________.” 9. “I didn’t expect her to win the competition.” => “___________________________________________________________.” 10. “I should go out now.” => “___________________________________________________________.” EX8. Đánh dấu √ trước câu đúng. Đánh dấu x trước câu sau, gạch chân lỗi sau và sửa. 1. My sister doesn’t want another ice-cream and I do either. _______________________________________________________________. 2. I will go the park tomorrow and my sister will go to the park too. _______________________________________________________________. 3. My favourite band is The Beatles and his favourite band is The Beatles either. _______________________________________________________________. 4. The apples in our garden are ripe and the oranges won’t ripe too. _______________________________________________________________. 5. My favourite drink is hot cacao. My friend’s favourite drink is beer too. _______________________________________________________________. 6. My wife doesn’t like doing housework and I don’t either. _______________________________________________________________. 7. I want to be a musician but my sister wants to be an actor either. _______________________________________________________________. 8. My essay didn’t get good mark. Tom’s essay doesn’t either. _______________________________________________________________. EX9. Dựa vào đoạn văn sau viết câu đồng tình với “too/ either”. Yesterday Ann and Jane went to the prom together. Both of them dressed up elegantly. They looked very beautiful. They really enjoyed the music there. Both Ann and Jane didn’t drink much because they weren’t thirsty. After the prom, they came home by bus. Ann and Jaen will never forget about the prom. They want to keep this happy memory forever. 0. Yesterday Ann went to the prom and Jane went to the prom too. 1. _______________________________________________________________. 2. _______________________________________________________________. 3. _______________________________________________________________. 4. _______________________________________________________________. 5. _______________________________________________________________. 6. _______________________________________________________________. 7. _______________________________________________________________.

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