31. When he was set free after twenty years m prison, he was amazed __________the changes he found.

A. at B. in C. on D. to

32. At the beginning of this term, our history professor __________ a list of books for us to read.

A. passed on B. fished out C. handed in D. made out

33. Don't __________ the camera __________ unless you are sure you can put it together.

A. take… off B. work… out C. set… off D. take… apart

34. At first I thought that math problem would be rather difficult, but it __________ to be fairly easy.

A. turned out B. turned up C. turned on D. turned over

35. __________makes men different from the other animals is that they can think and speak.

A. That B. The thing C. All D. What

36. We've tested three hundred types of boot, __________***pletely waterproof.

A. no of which B. none of which C. some of that D. neither of which

37. She was sitting in an armchair __________a book.

A. reading B. to read C. to be reading D. to have read

38. I would ask Ge***e to lend us the money if I __________ him.

A. had known B. have known C. knew D. to have read

39. I'm feeling sick. I __________ so much chocolate.

A. needn't have eaten B. couldn't have eaten

C. mustn't have eaten D. shouldn't have eaten

40. While he was climbing the high mountain, he had his leg __________

A. broke B. break C. broken D. breaking

答案：

31-35 ADDAD 36-40 BAADC