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guanyu855
2 năm trước
trên mạch thứ nhất của gen có 15%A,25%T,35%G.gen đó có 3276 liên kết hidro.a)xác định tỉ lệ và số lượng từng loại Nu của gen.b)xác định số lượng từng loại Nu tren cả 2 mạch của gen
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❸. WORD FORMS I. Give the correct form of the word given to complete the sentences. 1. My uncle usually takes a lot of _______ photos. (BEAUTY) 2. I think collecting old bowls is a very _______ hobby. (BORE) 3. You can use carved eggshells as _________ in your house. (DECORATE) 4. I like reading books because it __________ my knowledge. (WIDE) 5. Model making is a ____________ ways of spending time. (WONDER) 6. Reading books can also develop our __________ (IMAGINE) 7. That girl can use leaves to make ____________ sounds. (MUSIC) 8. You should choose a hobby because it will give you _______and help you relax (PLEASE) 9. Nick’s hobby is collecting stamps. He is a stamp ____________ (COLLECT) 10. Hoa is very _________and she paints very well. (CREATE) 11. Tom and his close friend are playing with his colourful train toys______ (ENJOY) 12. He thinks his brother has an ____ hobby - carving shells. It's quite strange to him. (USUAL) 13. It's____ that he carves beautiful faces into small woods. (AMAZE) 14. My mother hangs her beautiful pictures on the wall as home______. (DECORATE) 15. , Staying at home is the most.____________way of relaxation. (BORE) 16. It is__________to eat a lot of junk food. (HEALTH) 17. A thief stole all the_____________ in the museum. (PAINT) 18. There are___________symptoms when you have a cold. (differ) (DIFFER) 19. He gets a cold, so he has a _______nose. (RUN) 20. He drinks ________beer than me. (LITTLE) ❹. VERB FORMS I. Complete the sentences with the correct form of the verbs in brackets. 1. Sally and her family love (go) to the park in the summer. 2. Her mum likes (lie) on the blanket and loves (read) her favourite magazines. 3. Anna’s family (like) the park because they love (be) outdoors. 4. I enjoy (collect) dolls and it becomes my pleasure. 5. We love (watch) new films, and we (go) to watch a new Hollywood film next weekend. 6. My brother hates (do) the same things day after day. 7. Our uncle (play) badminton once a week. 8. I (collect) a lot of stamps from foreign countries so far. 9. In 2100, people (travel) in flying cars. 10. I’m so hungry, Mum. - I (make) you some sandwiches. II. Put the verbs in brackets in the correct tense form. 1. You (think) __________ collecting stamps costs much money? 2. My father thinks mountain climbing (be) __________ more dangerous than skating. 3. Every year, my mother (give) __________ me a nice doll on my birthday. 4. My brother (not like) __________ collecting stamps, he likes collecting glass bottles. 5. My sister likes (cook) __________ very much. She can cook many good foods. 6. Does your brother like (listen) __________ to music in his free time? 7. I think in the future, more people (enjoy) __________ going out by bicycles. 8. My father says when he's retired, he (go) __________ back to his village to do the gardening. 9. We are planting trees around our school now. Our school (be) __________ surrounded by a lot of green trees. 10. Lan says she loves collecting pens but she (not/continue) __________ this hobby from next year. III. Complete the text with the correct form of the verbs in the list. like (2) live be travel make sing read go write This is my favourite singer. He (1) a famous rock star. He (2) in America. He (3) all around the world and (4) in rock concerts. He (5) his songs and(6) his own video dips. In his free time, he (7) staying at home listening to his CDs. At weekends, he usually (8) to expensive restaurants with his friends. He also (9) a lot of books about strange things. I can’t wait to see him perform live. I (10) him so much.

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