It is impossible for us to finish _____(build) the new school in such a short time.
问题描述：
It is impossible for us to finish _____(build) the new school in such a short time.
答
finish + doing sth.
所以本题填 building。
impossible for sb to + do sth. 这里的do就是finish.
答
building
finish doing sth.
答
building
finish doing sth 完成做某事.
答
building ,finish +doing 的形式