1.--How long have you known the doctor?

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1.--How long have you known the doctor?
--__________he helped me 3 days ago.
A.When B.Before C.Because D.Since
2.How long may I ________ this book?For about a week.
A.borrow B.lend C.keep D.be kept
3.--How long have John _________ Mary?
--I do not know and I even did not know they had _________.
A.married,got married B.married with,married
C.been married to,got married D.been married with,got married
4.-___________ lonely space?
-___________ there was nothing but sand there.
A.How,In the past B.What,In the past few years
C.How,During the past few years D.What a,In the past
5.-How does your sister come here?
-She often comes home _______ Tom's car,not ________ train.
A.by,by B.with,with C.by,in D.in,by
6.-I do not knoe what is wrong with it.
-Do not worry.I will show you ________.
A.how to do it B.what to do it
C.to do it D.to do what

1.D
回答how long的问题,一般用“for + 一段时间”或“since + 某具体时刻”.
2.C
how long要求肯定句的谓语动词必须是延续性动词,而borrow和lend都是瞬间性动词；
I和keep之间是主动关系.
3.C
marry sb和get married to sb都是瞬间性动词,只有be married to sb可以延续,所以第一空只能填入be married to sb.
4.D
此感叹句为：What a lonely space!= How lonely the space is!
in the past few years做句子时间状语时,要求句子必须使用现在完成时；而in the past要求句子必须使用一般过去时.
5.D
用介宾短语表示“乘坐交通工具”时,用by则后面的名词不能有其他限定词；
如果用in/on时,则后面的名称可以有其他修饰词.
6.A
“疑问词 + 不定式”结构是名词性结构,在该句中充当show的宾语；
如果用what to do it,则what本身就是do的宾语,则it与what功能重复.

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