题目内容

----What made him worried?

----____ help the people in the snowstorm in the South.

A. Not known how to   B. Because we didn’t know how to

C. Our knowing not how to    D. Our not knowing how to

 

D

 

考查动名词短语作主语。语境:----什么使他担心?---我们不知道怎样帮助南方雪灾中的人们。问语中问的是主语what,答语也应答主语。

 

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