35. Today a large coal-fired power plant can give out in a single year as much poisonous gas as was blown out by the May 18,1980 outbreak of Mount St. Helens, ______ some. 400,000 ton.　

A. its amount was　 B. amounts to　 C. amounting to　 D. it was amounted

34. So difficult ________ it to live in an English－speaking country that I determine to learn English well.　

　　　 A. I have felt 　　B. have I felt　　 　 C. I did feel 　　 　D. did I feel

33. The medicine is supposed to cure this disease, but I’m not sure it　　　　 .

　　 A. does　　　　　 B. was　　　　　 C. has　　　　　　　 D. is

32. ----No one is so ____ about his joy as Doctor Li.　

----You are right. He devotes all his time and energies to his cause.

A. mad　　　　　　　　　　　　 B. wild　　　　　　　　　　　　 C. serious　　　　　　　 D. crazy

31. Hundreds of _____ of science fiction are published each year in our country.

　 　　 A. styles　　　　　　　　　　　 B. titles　　　　　　　　　　　　 C. subjects　　　　　　 D. topics

30. . ----Are you sure that he is able to do the work well?

　 ---- _______ he could give his mind to it.

A. In case　　　　　　　　　　 B. If only 　　　　　　　　　　 C. On condition that　　　 D. Unless

29. It is fairly common in Africa for there ___________ a group of expert musicians surrounded by others who also join in the performances.　

A. being　　　　　　　　　　 B. to be　　　　　　　　 C. be　　　　　　　　　　　　　　 D. is