34. -Will you stay for some more days?

-Sorry, I_____. My mother called to ask me to go back at once.

A. mustn’t 　　　　　　 B. may not 　　　　　 C. can’t 　　　　 D. wouldn’t

33. -Why didn’t you go to play football with us yesterday afternoon?

-I _____my mother with the housework then.

A. helped 　　　　　　　 B. was helping 　　　　　　 C. had helped 　　　　　　　 D. have been helping

32. We can easily become unhappy_____ we work out our problems in our daily life.

A. after 　　　　 B. if 　　　　　　 C. until 　　　　 D. unless

31. I’ ll never forget the day_____ the great scientist came to our school and gave us a speech.

A. that 　　　　　 B. which 　　　　　　　 C. when 　　　　 D. where

30. Last year was a hard time to my friend Jim, but he didn’t_____ hope.

A. pick up 　　　　　　 B. use up 　　　　　　 C. put up 　　　　　　 D. give up

29. _____you do, don’t miss this exhibition, for it’s so hard for me to get the tickets.

A. Whatever 　　　　 B. However 　　　　 C. Whenever 　　　　 D. Whether

28. This morning I had hardly got to my school when it_____ to rain.

A. had begun B. was beginning 　　　　 C. began 　　　　　　　 D. begins

27. Stephen Hawking can’t walk or even speak，_____he has become very successful.

A. but 　　　　　 B. and 　　　　　 C. or 　　　　　　 D. then

26. _____of the two story books are very interesting, so I can’t decide which one to choose.

A. All 　　　　　　 B. Any 　　　　 C. Either 　　　　　　 D. Both

25. Mary is tired of learning because, she is_____to do better than she can, both at school and at home.

A. thought 　　　　　　 B. expected 　　　　　 C. hoped 　　　　　　　 D. helped