1. Anarchists believe that the ideal society is one in which the motivation to maintain law and order lies in the innate reasonableness of human nature rather than in the treat of force.
A. lies in the innate reasonableness of human nature rather than in the threat of force
B. lie in the innate reasonableness of human nature rather than in the treat of force
C. lays in the innate reasonableness of human nature rather than the threat of force
D. lay in the innate reasonableness of human nature instead of the threat of force
E. lies in the innate reasonableness of human nature instead of the threat of force
这是一道综合考察的题目，首先是要区别lie and lay，那么这道题需要lie；其次是subject-verb agreement，由于主语是motivation所以谓语需要单数那么只有A and E 可以选择。最后是要判断rather than and instead of，理论上这两个词组是可以互换的，关键是看后面是否并列相同成分。所以in the threat of force是最终的答案。
2. The public's widespread belief in the existence of UFOs and their general curiosity about extraterrestrial life has generated considerable interest in science fiction.
A. UFOs and their general curiosity about extraterrestrial life has
B. UFOs and they are generally curious about extraterrestrial life which has
C. UFOs, as well as their general curiosity about extraterrestrial life, have
D. UFOs, as well as its general curiosity about extraterrestrial life, has
E. UFOs, as well as general curiosity about extraterrestrial life, have
关于and和as well as是非常流行考试点，它们需要关注两个方向，第一个是和谁连接，是比列前面一个句子成分还是并列一个句子，当然as well as不能连接句子。那么上面这道题目belief为主语，所以首先排除C and E，B其次排除因为句子中没有了谓语。A中their general ... 都属于existence中根据意思不正确，而D选项是existence of UFOs ... 和as well as its general curiosity 都属于belief里面。
3. In some countries, the political system works by a simple logic: the more an organisation contributes to politicians' campaign funds, its interests are better served by the policies and actions of the government.
A. its interests are better served by the policies and actions of the government
B. its interests are the better served through the policies and actions of the government
C. the better its interests are served by the policies and actions of the government
D. by the policies and actions of the government, its interests being better served
E. by the policies and actions of the government, service is the better for its interests
这是一道非常典型的GMAT改错题目，看似句子内容很多，实质上就考查了the more ..., the more ...，所以大家可以很快锁定选项C。