 154  5. Traffic accidents often (cause) by dangerous driving or poor visibility. 6. Ann told me she (work) hard in the lab for five hours the previous day. 7. Dealing with (a, the, -) environmental problems after they (become) serious is not very practical. 8. The policeman threatened to arrest the driver if he (not, answer) his questions, 9. Smog (damage) the ancient monument which now (need) to be restored. 10. Although they never (play) baseball before they had (an, the, a, -) enjoyable game. 11. Traffic accidents could (avoid) by driving at lower speed and more (careful, carefully) and by raising public awareness of the danger of drinking and driving. 12. Cindy said she (be) in a hurry. Nobody knew she (leave) in 10 minutes. 13. Robert said that he (not, have to) water the plants then because it (rain) the whole week. 14. Look! Mr. Thomas looks very smart today. He (wear) a new jacket which (suit) him very well. 15. The process of evolution (be) very hard for some creatures. (Along, among, between) with many other species, dinosaurs were unable to adopt to the changing environment and, as a result, (die) out. 16. When there are fewer than a hundred of species left, they (consider) to be almost extinct. 17. We (try) to increase people's awareness (of, in, at) environmental problems. 18. I want to warn you that if you (not, have) locks on your windows, the burglar will break in when you (be) away next time. 19. Humans are, of course, the biggest threat to many creatures and now that their secret places (discover), they have nowhere left to go. 20. All the telephonists speak English. If they (not, know) English, they (not, understand) half of the callers. 154 |
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