21[.单选题]It was your brother __ I met at the station.

　　A.who

　　B.whom

　　C.that

　　D.why

　　[答案]C

　　[解析]本句是强调句型，其构成是：It is(was)+被强调部分+that…。当被强调的主语表示人时，that可以用who替代。本句强调的是宾语。

　　22[.单选题]The man said he would hit me __ I told him where the money was.

　　A.until

　　B.unless

　　C.soon after

　　D.as

　　[答案]B

　　[解析]unless引起条件状语从句，意思是“除非”。

　　23[.单选题]A doctor, together with two nurses, __ sent to the mountain village.

　　A.have

　　B.have been

　　C.has

　　D.has been

　　[答案]D

　　[解析]主语是单数，尽管后面跟有together with等引导的短语，谓语动词仍用单数形式。本句是被动句。

　　24[.单选题]I have no intention of__ relations with them.

　　A.breaking up

　　B.breaking off

　　C.breaking out

　　D.breaking down

　　[答案]B

　　[解析]break up意为“打碎，分裂”;break off意为“断绝，结束”;break out意为“爆发”;break down意为“崩溃，瓦解”。根据题意，应选B。

　　25[.单选题]Stop __, boys! It's time for class.

　　A.talking

　　B.to talk

　　C.talk

　　D.being talk

　　[答案]A

　　[解析]stop doing sth.表示“停止做某事”;stop to do sth.表示“停下来(开始)做某事”。

　　26[.单选题]I would rather you __ those important files with you.

　　A.not take

　　B.didn't take

　　C.won't take

　　D.haven't taken

　　[答案]B

　　[解析]would rather后接的从句中用过去时表示虚拟语气。

　　27[.单选题]My mother bought that coat __ a low price.

　　A.at

　　B.in

　　C.on

　　D.with

　　[答案]A

　　[解析]本句句意是：我妈妈以低价买了那件大衣。

　　28[.单选题]If he __ the job, he will get more money right away.

　　A.accept

　　B.accepts

　　C.will accept

　　D.has accepted

　　[答案]B

　　[解析]条件状语从句中常用一般现在时态表示将来。

　　29[.单选题]Do you know any other foreign languages __ French?

　　A.but

　　B.except

　　C.besides

　　D.beside

　　[答案]C

　　[解析]but多与nothing, nobody，all等连用;except表示“除了，除去”;besides是“除了……还有 ”的意思;beside表示“在旁边”。

　　30[.单选题]__electrons are still smaller.

　　A.As atoms small are

　　B.As atoms smaller as

　　C.Small as atoms are

　　D.Smaller atoms as are

　　[答案]C

　　[解析]as引导让步状语从句时，表语常放在as前面。