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Câu 4. Thành phần hóa học và tính chất của xương? Khi gặp người bị gãy xương em phải làm gì? Câu 5. Tiêu hóa ở ruột non diễn ra như thế nào? Tại sao thức ăn từ dạ dày xuống ruột non từng đợt ? Hãy trình bày cơ chế đó? Câu 6. Hệ tuần hoàn máu gồm những thành phần nào? Nêu cấu tạo của các thành phần trong hệ mạch? Vì sao lại có sự khác nhau đó?
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These days, it is impossible to open a newspaper without reading about the damage we are doing to the environment. The Earth is being threatened and the future looks bad. (1)______ can each of us do? We cannot clean (2)______ our polluted rivers and seas overnight. Nor can we stop the (3)______ of plants and animals. But we can stop adding the problem while scientists look for the answers. It may not be easy to change your lifestyle completely. But some steps are easy to take: cut down the amount of driving you do, or use as little plastic as possible. It is also easy to save (4)______, which also reduces household bills. We must all (5)______ personal decision to work for the future of our planet if we want to ensure a better world for our grandchildren. 1. A. When B. Where C. What D. Why 2. A. to B. in C. on D. up 3. A. appear B. disappear C. appearance D. disappearance 4. A. water B. energy C. money D. health 5. A. make B. do C. take D. have

II Write the past form of the following verbs. 1. write 9. meet 2. see 10. tell 3. make 11. put 4. buy 12. speak 5. ride 13. know 6. wear 14. cut 7. hear 15. read 8. begin 16. go III. Put the following verbs into the past tense. 1. Alan (not see) ........................ Paul at school. 2. Carol (bring) ........................ her new laptop to school. 3. The baby (cry) ........................ all night long. 4. My brother (can) ........................ swim when he (be) ........................ four. 5. Charles (prepare) ........................ a nice dinner. 6. The children (eat) ........................ cheese sandwich. 7 you (sit) ........................ next to Mary? 8. There (be) ........................ a lot of people at the match. 9. Peter (forget) ........................ my birthday. 10. The children (play) ........................ football after school.

11. Thanks ………. . your letter. 12. I’ll see my mom and dad ……………. . their farm. 13. We have to work hard ………. home and……………. school 14. We’ll visit her ………. Christmas. 15. Are you tired …………. . watching TV? 16. She often brings them …………… school. 17. He works ………. a factory. 18. We always go to Ha Long Bay ………. vacation. 19. Tell me more ………. . your family. 20. Can you send me a photo ………. . your family? 21. He goes ………. the city …………his wife. 22. It takes 18 hours to get ………Hanoi ………. coach. 23. We write ………. each other twice a week. 24. He is the president …………………. our club. 25. She spends most ……………the time …………. the couch ………. front ……. the TV. 26. What do you usually do …………. school? 27. Why don’t you come …………. .? 28. They swap cards ………. their friends. 29. Will you play a game ……………. . catch? 30. What do you do ……………. . recess? 31. They usually have portable CD player ……………. small earphones. 32. I’ll take part……………. your club. 33. They read or study …………. the same time. 34. We enjoy all ………………… our classes. 35. …………. school we study many things. 36. …………. . history, we study past and present events………. . Vietnam and ………the world. 37. …………. . physics, we learn …………how things work. 38. She learns how to use a computer ………. . her Computer Science class. 39. Newspapers are ………. the racks ……………. the middle. 40. Math books are ……………. . the shelves ………. . the left. 41. The largest library is ………………Washington D. C, the capital ………. the USA. 42. Those books ………. the back …………the libraries are ………English. 43. Now, come and look ……………the kitchen. 44. My uncle is …………. . work now. 45. Can I see the rest ………the house? 46. She’ll have a party ………. . her birthday.

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