1.Don't always____ on others for helping doing your exercises.
A)lean B)stand C)bend D)stoop
答案：A lean on 靠着。
2.An enterprise usually needs a_____ adviser.
A) legitimate B) lawful C) useful D) legal
答案：D legal adviser 法律顾问。
3.Fewer and fewer of today's workers expect to spend their working lives in the same field, _____the same company.
A) less likely B) much worse C) turn over D)let alone
答案：D let alone 更不用说。much worse 更糟糕的是。less likely 不那么可能，较少可能。
4.For the new country to survive, _____ for its people to enjoy prosperity , new economic policies will he required.
A) to name a few B) let alone C) not to speak D) let's say
答案：B let alone 更不用说。to name a few 只举少数几个例子。not to speak(of ) 更不用说，还不算[注意后面跟介词of]。let’s say 假定说，譬如说;假如，假定。
5.This is the second time I have been ____ by that person; I shall never trust him again.
A) let off B) let down C) let up D) let out
答案：B let down 意为“使失望”，符合题意。Let off 意为“原谅”。let out 意为“使流出，放出”。let up 意为“减弱”。
6.His father has been working hard for many years to support him a university so he did not want to _____.
A) let him out B) let him in C) let him down D) let him away
答案：C let …out 让人出去。let… in 让人进来。let down 令人失望。let away 让人走开。
7.The mother said she would_____ her son washing the dishes if he could finish his assignment before supper.
A) let down B) let alone C) let off D) let out
答案：C let off 允许不做;放过(不予惩罚)。Let down 辜负，使失望。let alone 更不用说。Let out泄露，透露(机密)。
8.My father ____ a cry of joy while watching the wonderful football match on TV.
A) let out B) give out C) put out D)get out
答案：A let out 无意说出。give out 公布。put out发表。get out 泄露。
9.If you do not follow my suggestion, you will make yourself ____to dangers.
A) likely B) possible C) liable D) probable
答案：C liable与介词to 搭配指“有……的倾向，易于……，易遭受”。
10.He is ____ to know the answer.
A) likely B) probably C) maybe D) perhaps
答案：A 因为likely 用于短语“be likely to”时意为“可能做某事”，而probable ，maybe和perhaps都是副词，不能用于这一结构。
