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phamquynhanh492002
2 năm trước
Một gen có chiều dài 0,51 micromet, G=900 a) Xác định số nu từng loại b) Tính khối lượng phân tử c) Tính số lk H2?
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I. Choose the best answer. 1. .................. sports do you play? A. How B. Who C. Which D. What’s 2. My mother wants a good pair of shoes because she often goes .................. A. jogging B. fishing C. sailing D. reading 3. He often .................. his kite when he’s not busy. A. does B. plays C. goes D. flies 4. Why don’t we go to the movies? A. Because I like it. B. Good idea. C. Yes, we do. D. I don’t think so. 5. Some people can speak many ................... A. countries B. nationalities C. languages D. speeches 6. People are .................. many forests because they need more land. A. destroying B. producing C. growing D. polluting 7. There is .................. oil in this bottle. We should buy some more. A. a few B. few C. little D. a little 8. Can I help you? - .................., please. I need a kilo of beef. A. Sorry B. Yes C. Can D. No 9. Minh .................. likes fish and beef. A. isn’t B. don’t C doesn’t D. never 10. He goes to work six days a week. He .................. goes to work. A. always B. usually C. often D. never II. Circle the word that has the underlined part pronounced differently. 1. A. citadel B. vacation C. destination D. lemonade 2. A. teachers B. doctors C. students D. workers 3. A. accident B. soccer C. clinic D. camera 4. A. mouth B. weather C. thick D. throw 5. A. language B. engineer C. sausage D. jogging III. Rewrite the sentences. Ex: Why don’t we go out for a walk? => My father suggested going out for a walk. 1. Lan’s hair is long. → Lan 2. Nam rides his bike to school every day. → Nam goes 3. Are there four people in your family? → Does 4. Nobody in our class is taller than Nga. → Nga 5. Let’s go swimming. → What about 6. My house is behind the post office. → The post office 7. She likes drinking milk. → Milk is 8. Ba has a sister, Lan. → Ba 9. What’s the height of the Mount Everest? → How 10. This boy is strong. → He is IV. Give the correct form of the words. 1. There are lots of ..................... (beauty) beaches in Viet Nam. 2. Is Mr.Ha a ..................... (business)? 3. She’s from Vietnam. What’s her ..................... (nation)? 4. Air ..................... (pollute) is a big problem in big cities. 5. In the ..................... (neighbor), there is a hospital and a factory. V. Fill in the blank with a suitable word. 1. A few people are ..................... the mountain and they are ..................... danger. 2. I have to stay ..................... late because I don’t finish ..................... my homework. 3. My father always goes to work ..................... his own car. 4. Our school starts ..................... six forty five to eleven o’clock. 5. The beef is on the table ..................... the eggs and the fish. VI. Give the correct form of the verbs. 1. What they ..................... (do) tonight? - They ..................... (listen) to music on the radio. 2. Your brother ..................... (can, swim) ? - Yes, he can. He ..................... (swim) very well. 3. He ..................... (be) tired and he’d like ..................... (sit) down. 4. Hoa ..................... (not do) her homework in the afternoon. She ..................... (do) it in the evening. 5. Look! The plane ..................... (fly) towards the airport. It ..................... (land). VII. Give the correct form of the words in comparative. 1. Which is the ..................... (big) city in Viet Nam ? 2. Spring is .................. (warm) than Fall. But Summer is the ................... (hot) season of a year. 3. Hoa is the ..................... (good) student in our class. 4. The Nile River is the ..................... (long) river in the world. 5. The city is ..................... (noisy) than the country.

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