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để hòa tan hoàn toàn 11.2 gam fe cần dùng v(lit) dung dịch hcl 0.5 m sau khi kết thúc thu đc v1 (lit) khí thoát ra đo điều kiện tiêu chuẩn a. tính v và v1 b. tính muối thu đc
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UNIT 11: NATIONAL PARKS I. Give the right form of the words in brackets 1. Can you name some of the ……………….parks in Vietnam and in the world? (nation) 2. Use a sun-cream that gives adequate …………….against harmful rays from the sun (protect) 3. There are some ………………..among the species of animals and plants (differ) 4. We learn about how one species is dependent upon another for ……………..(survive) 5. American women are not used to being……………..(depend) 6. The …………………has threatened the park and many of the animals in it (contaminate) 7. To protect the endangered species from extinction, some organizations have been ….……(establishment) 8. It is suggested that we should find the ways to protect the air from being …………….…(pollution) 9. She is wearing a ………………dress every time I see her (differ) 10. Laws have been introduced to prohibit the killing of…………………animals (danger) II. Complete the sentences by filling in blank with a suitable preposition 11. You may be surprised …………….the large variety of animals. 12. The best time to visit national parks is when the rainy season is ………………. 13. Who will take care ………………your house when you go away? 14. There are some differences ……………..American English and British English. 15. What is the area ……………….the rainforest in this park? 16. If more chemicals are released ……………..the water what will happen? 17. Some of the animals and plants can be protected ………………the destructive influence of human being. 18. Hurry up or you’ll be late …………………the meeting. 19. Do you believe that people can live………………fruit and vegetables? 20. She prevented me ……………….going out after dark. III. Give the correct tense of each verb in brackets 21. ….You (finish)………………your homework yet? 22. Peter (work)……………at the moment, so he can’t answer the phone. 23. While we (play)……………..tennis yesterday afternoon, someone (steal)…………….my handbag. 24. I (have)………………..an accident when I (make)………………a phone call in a car. 25. We (not meet)……………..her again since her last birthday. 26. I hope that she (get)………………the job. 27. The fire (go)………………..out when I (work)…………………on the computer. 28. When I (find)………………my purse, someone (take)……………the money out of it 29. Listen to these people. Which language they (speak)…………………? 30. What you (do)………………….when I (phone)………………..you last night?

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