No sooner-----themselves in their seats in the hall than the

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No sooner-----themselves in their seats in the hall than the
speaker began his speech.
A.they did settle
B.had they settled
C.did they settle
D.they had settled
The manager promised to keep us————————of how our business was going on.
A.informed
B.informing
C.being informed
D.to be informed
The boy seldom helps his parents with the housework；-————.
A.nor does his sister
B.so his sister does
C.neither his sister does
D.so does his sister
I apporve of-----to earn some money ,but please don’t neglect
your studies.
A.you to try
B.you try
C.your try
D.you trying
请说明为什么选这个答案

1. No sooner-----themselves in their seats in the hall than the
speaker began his speech.
A.they did settle
B.had they settled
C.did they settle
D.they had settled
选B,否定词提前需倒装.no sooner ... than ...是一个句型,总是用倒装形式,时态总是过去完成时.因为settled动作发生在began之前.
2. The manager promised to keep us————————of how our business was going on.
A.informed
B.informing
C.being informed
D.to be informed
选A,keep sb/sth done 句型,因为us与inform存在被动关系,所以要用过去分词表被动.
3. The boy seldom helps his parents with the housework；-————.
A.nor does his sister
B.so his sister does
C.neither his sister does
D.so does his sister
选A,表示“……也一样”可定用so,否定用nor或neither,且必须用倒装句.C没有倒装,因此是错的.
4. I apporve of-----to earn some money ,but please don’t neglect
your studies.
A.you to try
B.you try
C.your try
D.you trying
选D,这个单词估计是错了吧,应该是approve,不是apporve.
approve of sb sth/sb's doing sth 同意某人干某事.
这是考察动名词复合结构的用法,动名词复合结构的构成是：物主代词或名词所有格+doing,但是如果这个复合结构不是作主语,就可用人称代词或名词的宾格代替这个物主代词或名词所有格.
你的这个句子是牛津词典上的一个原句：I approve of your（或者you） trying to earn some money, but please don't neglect your studies. 我同意你去挣一些钱, 可是请不要误了功课.

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