30.

42. The passage mentions that the grade F was once banned at ______

33.磊磊参加的合唱团少来了一个人，没人发现，但今天少来了两人，磊磊一下就发现了，这说明磊磊（ ）能力强。

5. Mainstream pro-market economists all agree that competition is an ______ spur to efficiency and innovation.

18.He has made another wonderful discovery, ______ of great importance to science.

7. The supporters of death penalty argue that the regulation would _______ criminals from carrying guns.

43.How many students can get A in college nowadays?

37.

50. The foremost reason why the egg-based method is defective lies in ________

48. The moon-landing is mentioned in the first paragraph to illustrate ________.

26.

1. Now may farmers have reverted to traditional farming methods, ________ their ancestors’ way to handle specific pest or disease problems.