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1.She was sorry that she had got no knife to.

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1.She was sorry that she had got no knife to.
A.to cut B.cutting C.to cut it D.to cut it with
D(这题不明白)
2.He did everything he could.the old man.
A.to save B.save C.saving D.saved
A(could不是情态动词么,要加原型,为什么选A?)
3.What he told us is very interesting,.
A.isn't it B.isn't they C.can't they D.is it
A(为什么不选B?主语不是he么)
4.Seldom.his homework in the moring.
A.my brother does B.does my brother
C.my brother do D.does my brother do
D(为什么不选B?)
5.I saw was two men crossing the street.
A.What B.Whom C.Who D.That
A(为什么不选D)
求详解
1.She was sorry that she had got no knife to.
1.cut something with a knife,这里no knife 是做with 的宾语
2.这个是个省略句,原句是这样He did everything (that he could do) to save the old man.括号内的是一个省略了that的由that引导的定语从句,to save 是作为不定式的目的状语从句.
3.主语是由what引导的主语从句,他所告诉我们的事情非常有趣,不是吗,是故事有趣.
4.seldom是个表示否定的副词,当其位于句首时要采用倒装语句,把助动词或情态动词提前,原来的的动词放后,如果原来的动词就是do的话仍要用其原型放在后面.
5.这题类似第三题,都是由what引导的从句作为主语,what在句中担任宾语的成分.that引导的主语从句that在句中不担任任何成分,但不可以省略.
以上就是详细解释,不明白的hi我.