31.Of all reasons for my decision to become a university professor，my father's advice was most important one.

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

32. People have always been curious how living things on the earth exactly began.

A. in B. at C. of D. about

33. Tom got the first place，________ made his parents happy.

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

34.The door is _____now. It was Jack that ______it a moment ago.

A， closed，closed B. opened，opened C. close，closed D. open，opens

35. I couldn't help but ______ good-bye to him.

A. to say B. say C. saying D. said

36. Hardly ______ the railway station ______ the train _______.

A. had I reached，when，started B. did I reach，when，start

C. I had reached，than，had started D. I reached，than，started

37. There lay a ______ box in front of the window.

A. little round wooden black B. black little round wooden

C. little round black wooden D. wooden round black little

38. He insisted every minute _____ made full ______ of ____ our lesson.

A. should，used，to study B. should，use，to studying

C. is，use，study D. be，use，to study

39. They plant potatoes and tomatoes，______ corns.

A. besides B. except for C. except D. but

40. You don't think I can finish the work by myself，_________?

A. do you B. don't I C. can't I D. can I

答案：

1-5 DAABB 6-10 ACBAB 11-15 ACDAB 16-20 CABCC

21-25 CDBBC 26-30 DBDBC 31-35 DDAAB 36-40 ACDBD