32. We _______ on this project for four hours. Let’s have a rest.

A. are working　　 　B. have been working　　　 　C. worked 　　　　D. had worked

31. What the doctor really doubt is_____my mother will revover from the serious disease soon.

　 A. when　 　　　　　　　B. how 　　　　　　　　C. whether 　　　　　　　D.why

30.Her name was on the _______of my tongue, but I couldn’t tell it.

　 　A. point　 　　　 　　　B. edge　 　　　　　C. top　 　　　 　　　　　　D. tip

29. ________her home, Mary helps her mother with some housework.

A. As soon as she returns　　　 　　　　　B. On arriving　 　　　

C. After she gets　　　　 　　　　　　　　D. Immediately she reaches

28. They often _______their friends at weekends and they always have a good time.

A.envy　　　　　 B. interest　　　 C. entertain　　　 D. encourage

27. Do you think everything _______was true?

　 A. what he said　　　 B.he said 　　　　C. which he said　　　　 D. as he said

26.It was Tom and his friends that________for the serious accidents.

　 A.were to be blamed　 B. was to be blamed　　 C. were to blame　　　 D. was to blame

25. He was reading a very interesting story, completely_______himself in the story.

　 A. lost　　　　　 B.being lost　　　　　 C.to be lost　　　　　 D. losing

24. Whoever invented _______wheel is believed to have made ______most useful invention in _______history.

　 A.a; the; /　　　 B.the; the; /　　　　 C. the; a; /　　　　 D.a; a; the

23. The importance of saving gas_______be stressed too much. Automobiles use up some 70 billion gallons of gas a year.　

　’t　　　 B. mustn’t　　　　　 C.shouldn’t 　　　　D. may not