11.The young man promised to his parents, "I would never ( )again."

　　A.let you down

　　B.let you out

　　C.let you in

　　D.let you by

　　【参考答案】A。短语辨析。let down使…失望，如：He had promised to work harder，but he let me down.他答应过我要努力的，可他让我失望了。let out放走，释放;let in允许进入。letby没有这个用法。

　　12.Mary regretted (　　)to John's birthday party last Sunday.

　　A.not going

　　B.not to go

　　C.not having been going

　　D.not to be going

　　【参考答案】A。regret后面要跟动名词作宾语，动名词的否定式是在动名词之前直接加not，如：I regretted not having worn a thicker coat.我后悔没有穿厚一点的外套。C不正确是因为时态错误，去参加晚会是一个瞬间的动作，不能用完成进行时。

　　13.Mary never tells anyone what she does for a (　　).

　　A.job

　　B.work

　　C.profession

　　D.living

　　【参考答案】D。同定搭配。livin9生计。make(earn)a livin9谋生。

　　14.William has cut his smoking (　　)to five cigarettes a day.

　　A.down

　　B.in

　　C.off

　　D.out

　　【参考答案】A。短语辨析。cut down削减，减少，如：The car industry cut down production.汽车制造业缩减了产量。cut in插嘴，打断;cut off使分离，使隔离;cut out切去，割去。

　　15.I am very disappointed (　　)the results of the experiment.

　　A.from

　　B.for

　　C.to

　　D.with

　　【参考答案】D。短语搭配。be disappointed with sth.(sb-)对某事(某人)感到失望。

　　16.His few personal belongings made it possible for him to move from place to place (　　).

　　A.in ease

　　B.at ease

　　C.with ease

　　D.with easiness

　　【参考答案】C。短语辨析。with ease容易，不费力，如：These tiny bananas could be consumed six at a time with ease.很容易一次吃下六只这些小香蕉。at ease自在，不拘束，如：The examiner soon put the candidates at ease.考官很快就使考生们的情绪放松了。

　　17. He talks as if he (　　)everything in the world.

　　A.knows

　　B.knew

　　C.had known

　　D.would have known

　　【参考答案】B。本题考查虚拟语气的用法。在as if引导的状语从句中，要用虚拟语气。本句是对现在事实的虚拟，要用过去时。

　　18.The doctor advised that Mr.Malan (　　)an operation right away so as to save his life.

　　A.had

　　B.would have

　　C.have

　　D.was going to have

　　【参考答案】C。本题考查虚拟语气。动词advise后面应该接虚拟语气。

　　19.Television makes us better (　　)than ever before.

　　A,inform

　　B.informing

　　C.informed

　　D.to be informed

　　【参考答案】C。本题考查分词的用法。分词可以作宾语补足语，因为宾语与分词之间是被动关系，所以要用过去分词。

　　20.You could have done much better yesterday.Why (　　)?

　　A.didn't you

　　B.couldn't you

　　C.hadn't you

　　D.shouldn't you

　　【参考答案】A。本题考查动词时态的用法。第一个句子用了虚拟语气，表示与过去事实相反，所以后面的特殊疑问句应该使用正常的语气。这里应用一般过去时。