lawful – legal合法的

　　enjoyable
-- joyous –happy – pleasant愉快的，快乐的 (来源：英语杂志 http://www.EnglishCN.com)

　　irresistible不可抗拒的

　　profitable – beneficial 有益的；有用的

　　6. These are our motives for doing it.

　　A. reasons B. excuses C. answers D. replies

　　比较:

　　These are our motives for doing it

　　A. reasons B. arguments C. targets D. stimuli

　　分析:答案都是reasons.

　　motive – reason动机

　　excuse解释；理由

　　answer –reply回答，答复

　　argument争论，论据，论点

　　target靶子，目标

　　stimulus刺激物 (pl. stimuli)

　　7. The river widens considerably as it begins to turn west.

　　A. extends B. stretches C. broadens D. bends

　　比较:

　　The river widens considerably as it begins to turn west.

　　A. extends B. stretches C. broadens D. traverses

　　分析: 答案都是broadens.

　　widen – broaden变宽

　　considerable – large 相当(大、多)的，很多的

　　extend -- stretch伸展，伸出

　　bend弄弯，使弯曲

　　8. Many economists have given in to the fatal lure of mathematics.

　　A. error B. puzzle C. attraction D. contradiction

　　比较:

　　Many economists have given in to the fatal lure of mathematics.

　　A. error B. function C. attraction D. miracle

　　分析: 答案都是attraction.

　　fatal – killing -deadly 致命的

　　lure – attraction – temptation诱惑

　　error – mistake错误

　　puzzle难题，迷惑

　　contradiction矛盾，抵触，相反

　　miracle –wonder 奇迹

　　9. A great deal has been done to remedy the situation.

　　A. maintain B. improve C. preserve D. protect

　　比较:

　　Hundreds of years ago cloves丁香were used to remedy headaches.

　　A. disrupt 使分裂 B. diagnose C. evaporate D. cure

　　分析: 分别考察动词remedy的两个常用词义.

　　A great deal 大量的(事情, 工作等)

　　maintain -- preserve – protect保护，维护。

　　diagnose 诊断(疾病)。

　　cure -- treat 治疗