39. A. which　　　　　 B. when　　　　　　　　 C. for　　　　　　　　　　 D. then

38. A. could　　　　　 B. should 　　　　　　 C. would　　　　　　　 D. might

37. A. easy　　　　　　 B. simple　　　　　　　 C. abstract　　　　　　 D. difficult

36. A. nowhere　　　 B. everywhere　　　　 C. anywhere　　　　　 D. somewhere

34. _______ laws of motion are simple, motion, as we see it in the world about us, certainly is not.

A. When B.　　 While　　　　　　 C. As　　　 D. Even

33. They stood on the top of the high building, ________ they could see the whole city.

A.　 in that　　 B. in which　　　　　　 C. form it　　　　　　　 D. from where

32. The best job is __________ that uses your skill in doing something together with your interest in the subject.

A. it　　　　　　　 B. the one　　　 C. that　　 D. one

31. After that earthquake last year, we had to start _________ scratch rebuilding our houses.

A. of　　　 B. from　　　　　　　　 C. in　　　　　　　 D. up

30. __________ is responsible for the Chenzhou train collision will be punished.

A. Whatever　 B. No matter what　　　　 C.　　 Whoever D. No matter who