摘要：(2010·吉林实验中学高三一模)----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 67D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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