1.　　 ①Whoever has c_____ sense knows that ___________________(吸烟有害健康)

②As a consequence, they can cause serious pollution, ____________________(这对我们的环境很有害处)

30. – There is a lot of smoke coming out of the teaching building there.

　 -- Really? It ________ be a fire, most probably.

为了理想，我宁愿忍受寂寞，饮尽那份孤独。

29. As I was sitting down to have supper, the telephone ________(偏偏) ring.

28. You may keep the book a further week ________ ________(倘若) no one else requires it.

27. You must ________ ________ ________(摆脱) all your worries and have a good rest.

26. He was ________ ________(欠债) when he was poor, but has been out of debt since he got rich.

25. I don’t know how they managed to ________ ________ ________(不受惩罚) paying such low taxes.

24. “Then when do you come out in the morning?” I ________ ________(扔出；随口说出)another question.

23. We should ________ ________(抛弃) the bad habits.

22. The little child ________ ________ ________(疲惫) walking so far.