40. ---It snowed heavily last night and there must be a lot of snow on Emei Mountain.

　 ---No, we found a little snow, as most of it seemed ______ off the mountain.

　 A. to have blown　 　　 B. to have been blown 　 C. to be blown　　　 　 D. to be blown

39. ______ is often the case, we have worked out the production plan.

　 A. Which　　　 　　　　 B. When　　　 　　　　　　　　 C. What　　　 　　　　　　　　 D. As

38. There is no light in the dormitory. They must have gone to the lecture, ______?

A. didn’t they　 　　　 B. don’t they 　　　　　　　　 C. mustn’t they　 　　　　 D. haven’t they

37. ______, and the problem would be settled.

　 A. A bit more effort　　　　 　　　　　　　　　 B. Having a little effort

　 C. If you have a bit more effort　　　　 　　　　 D. There being a little effort

36. The work is ______ smoothly. I’m sure it will be finished in a month or so.

　 A. progressing　　　　　　 B. improving　　　　　　　　　　　 C. moving　　　　　　　　　　　　　　 D. keeping