Xu hướng di chuyển dân cư hiện nay ở Bắc Mỹ như thế nào? Tại sao

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1. The baby’s getting…………..everyday. a. more big b. bigger c. bigger and bigger d. more and more big 2. English…………at the meeting. a. speak b. speaks c. is speaking d. is spoken 3. These flowers...................... a. smell good b. smells good c. smell well d. smells well 4. She ………..getting up early now. a. didn’t use to b. is used to c. is using to d. used to 5. Did you put ..................... sugar in my coffee? a. many b. a few c. so many d. much 6. Do you know……………… yesterday? a. if did they arrive b. if they arrive c. if did they arrived d. if they arrived 7. If you are tired, you should………..a break. a. make b. do c. take d. go 8. Beef is my......................food. a. preferable b. favorable c. favorite d. likeable 9. I’m looking......................to hearing from you. a. at b. after c. over d. forward 10. She..............a cake when the telephone rang. a. makes b. make c. has make d. was making 11. I’ve known him ..........................I left school. a. when b. before c. until d. since 12. He has left his book here on.........................so that you can read it. a. design b. intention c. purpose d. meaning 13. What would you........................me to do for you? a. want b. hope c. wish d. have 14. After retiring, my father will spend his........................on an expensive holiday. a. dollars b. accounts c. savings d. cheques 15. We can’t go wrong if we.........the instructions. a. follow b. keep c.take d. guide III. Read the text below. Use the word given at the end of each line to form a word that fits in the space in the same line. Example: (0) impossible These days it is(o)………….......................to open a newspaper without POSSIBLE reading about the damage we are doing to the environment. The earth is being(1)………….....................and the future looks bad. THREAT What can each of us do? We cannot clean up our(2)…………......................rivers and seas overnight. POLLUTION Nor can we stop the(3)……………...................of plants and animals. But APPEAR we can stop adding to the problem while(4)………………................. .......... SCIENCE search for answers, and laws are passed in nature’s(5)……………............... DEFEND It may not be easy to change your lifestyle(6)…………….................., but COMPLETE some steps are easy to take: cut down the amount of(7)………….................. DRIVE you do or use as little plastic as possible. It is also easy to save energy, which also reduces(8)…………….................bills. We must all make HOUSE a personal (9)……………................... to work for the future of our planet if DECIDE we want to (10)…………....................a better world for our grand- children. SURE

I. Fill in the blank with an appropriate preposition 1. Many other species exist________________ this planet. 2. Human beings have a great influence________________ the rest________________ the world. 3. They are affecting the water supply by using water________________ industry and agriculture. 4. They are changing weather conditions by cutting________________ trees in the forests. 5. This has resulted________________ two serious consequences. 6. As a result, the number________________ rare animals is decreasing so rapidly that they are________________ danger________________ becoming extinct. 7. Scientists have made lists________________ endangered species and suggested ways to save them. 8. Many organisations have been set________________ and funds have been raised. 9. Thousands of national parks all________________ the world have been established to protect endangered animals. 10. If people’s interference________________ the environment decreases, more species will survive and produce offspring. 11. The amount of solar energy that reaches the earth depends____________________ the atmosphere. 12. The natural environment consists____________________ all natural resources. 13. Solar energy can be changed____________________ electricity. 14. Human beings have a great influence____________________ the rest of the world. 15. What exactly is the influence of air pollution____________________ human beings? 16. The campaign will hopefully ensure the survival____________________ the tiger. 17. The EU has imposed a ban____________________ the import of seal skins. 18. Human beings are responsible____________________ the changes in the environment. 19. If people’s interference____________________ the environment decreases, more species will survive and produce off- spring. 20. National parks should be set____________________ to save animals and plants. 21. ______ present, most of our energy comes______ fossil fuels. 22. Solar energy can be changed______ electricity. 23. When water moves ______ a high place to a lower place, it makes energy. 24. Water energy is used______ create electricity. Its power gives energy______ pollution. 25. Nuclear energy can provide enough electricity______ the world’s needs for hundreds of years. 26. Many organizations have been set ______ to study alternative sources of energy. 27. How______ make use______ alternative sources of energy is a question for researchers all______ the world. II. Write the correct tenses. 1. Look! The train________(come). It always__________(come) to the station on time. 2. I need an umbrella because it (rain). 3. The burglar__________(open) the safe when he___________(hear) footsteps. He immediately________(put) out his torch and_____________ (crawl) under the bed. 4. Just as I_________(wonder) what to do next ,the phone rang. 5. Why _____________you_____________ ( buy ) this paint last week ? 6. Until yesterday, I_______ (never, hear) about it. 7. Sam___________ (leave) before we________ (get) there. 8. He_____________ (watch) television when the phone rang. 9. After the guests_________ (leave), I_________ (go) to bed. 10. When Judy (get) home, her hair _______still (be) wet . 11. Water (consist) __________________ of hydrogen and oxygen. 12. John (sleep) __________________ right now 13. Alice and Louise (not, buy) __________________ anything at the store yesterday. 14. After they (leave) __________________, we (sit) __________________ down and rested. 15. John and Mary (talk) __________________ on the phone now. 16. After three days of rain, I’m glad that the sun (shine) __________________ again today. 17. He (write) __________________ his report for two days, but he (not, finish) __________________ it yet. 18. I (stand) __________________ under a tree when it (begin) __________________ to rain. 19. He (need) __________________ a pen at the moment. 20. Last year at this time, I (attend) __________________ school.