31. It's high time you ____ some reading.

A. got down to do　　　 　　　　B. set out reading　 　

C. got down to doing 　　　　　D. set about to do

30. The students quieted at once on the teacher's threat (威胁) to ____ them after school.

A. stay　　　　　　　　 B. leave　　　　　 　C. remain　　　　 D. keep

29. He is not back yet. What do you consider ____ to him?

A. happening　　　　　 B. has happened　　 　C. happens　　　 　D. to happen

28. It's necessary for ears to　　　 distance from one another.

A. be kept a certain　　 　B. keep some　　　 　C. be kept certain　 　D. keep a great

27. -Would you mind not smoking?

　　 - 　　　　.

A. Of course not　　　　 B. Please do　　　　 C. Sorry.　　　　　 　D. Go ahead

26. Mother was __ that the cake would be good to eat.

A. in the hope　　　　　 　B. in the hope of　　 C. hoping　 　D. in the hopes

25. __ other places of interest, we think Zhangjiajie is ___ one to go to.

　　 A. Comparing with; a most satisfied　　　　　 　B. Compared to; the most satisfied

C. Comparing to; the more satisfying　　　　　 D. Compared with; a more satisfying

24. The Culture Revolution is the most important political _____ in history.

A. affair　　　　　　　 　B. event　　　　 　　　C. incident　　　　 D. business

23. Careless driving ___ a lot of highway accidents.

A. affects　　　　　　 　B. results　　　　 　　C. makes　　　　 　　D. causes

22. He said to us that we shouldn't　　　　 　in time of difficulties and that we should be confident.

A lose our hearts　　　　 B. discourage　　　　 C. lose heart　　　　 D. encourage