1.B 2.A 3.B 4.D 5.C
6.B 7.D 8.B 9.A 10.B
11.A 12.C 13.C 14.D 15.A
16.C 17.A 18.C 19.D 20.D
21.D 22.D 23.A 24.C 25.D
26.C 27.A 28.A 29.B 30.B
31.A 32.D 33.B 34.D 35.D
36.C 37.D 38.B 39.A 40.A
41.C 42.D 43.A 44.F 45.G
46.在物理学上，一种方法是将这种冲动完美发挥到极点并且导找到一种万能的理论---一条我们都可以看的见，明白的普遍公式。
47.在这里，达尔文主义似乎提供了一个准则，如果所有的人类都有共同的起源，那么文化差异能够追寻到更早的可控的起源也是合理的。
小作文范文：
Dear Sir or Madame,
As one of the regular customers of your online store, I am writing this letter to express my complaint against the flaws in your product—an electronic dictionary I bought in your shop the other day.
The dictionary is supposed to be a favorable tool for my study. Unfortunately, I found that there are several problems. To begin with, when I opened it, I detected that the appearance of it had been scratched. Secondly, I did not find the battery promised in the advertisement posted on the homepage of your shop, which makes me feel that you have not kept your promise. What is worse, some of the keys on the keyboard do not work.
I strongly request that a satisfactory explanation be given and effective measures should be taken to improve your service and the quality of your products. You can either send a new one to me or refund me my money in full.
I am looking forward to your reply at your earliest convenience.
Sincerely yours,
Zhang Wei
48.从我们的共同特征中过滤独特性能够使我们明白文化行为的复杂性起源以及是什么在进化方面和认知方面指导我们人类。
49、其实，由约书亚格林伯说，将
