Is ___ possible ___ us to work out all the questions in such a short time?A. it, for B. that, of C. it, of D. that, for

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Is ___ possible ___ us to work out all the questions in such a short time?
A. it, for B. that, of C. it, of D. that, for

你好!
这里选择A
考察了it作为形式主语,真正的主语是后面的to不定时的考点,以及一般疑问句
换元本句就是:
It is possible for us to work out all the questions in such a short time

A