33. ______ this experiment is known to us.

A. Which to do 　 B. Whom to do　 　 　C. How to do　 　D. What to do

32. _______, we watched half a year’s food destroyed before our eyes.

A. Helplessly and sad　　　 　　　　　　　 　B. Helplessly and sadly

C. Helpless and sadly　　　 　　　　　　　 　D. Helpless and sad

31. You are welcome to drop in at my new house whenever______.

A. it is convenient to you　　　　　　　　 　B. it is convenient of you

C. you are convenient　　 　　　　　　　 　D. you convenient

30. I dislike ___ when students talk in class.

A. that 　　　B. it　　　　 　　 　C. this　　　　 　D. you

29. ----Are there any copies left in the book store?

----Sorry. There are ____ if ______.

A. few; some　　B. a few; any　　C. few; any　　　 　D. some; few

29. A. Which　　　B. in which　　　C. where　　　　　　 　D. there

28. The photo was taken ______ stood the famous Bird’s Nest in Beijing during the Olympics.

27.-----What does the model plane look like?

　 -----Well, the wings of the plane are ____ of its body.

A. more than the length twice　　　　　　　　　 B. more than twice the length

C. twice more than longer than　　　　　　　　 D. more twice than the length

26. The poor woman with her two children _____ in a street corner.

A. was seen to beg　　　　　　　　　　　　　　　　 B. were seen beg　

C. were seen begging　　　　　　　　　　　 D. was seen begging

25．Some people who don’t like to talk much are not necessarily shy；they 　just be quiet people．

A．Must　　　　　　 B．May　　　　　　　　　 C．should　　　　 D．would