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