It has been required that our monitor ___our homework before

6个回答

  • A 句中是require的特殊用法,在虚拟语气中有提到,表示强调、命令.补充完整应该是 should hand out.

    B 首先nowhere 放在句首要部分倒装,其次根据意思要使用被动,再看是in past few years,所以用一般过去式.

    C consider doing sth,固定搭配,表示考虑做某事.后面一个空是表示被动,主动形式是consider sb to be,这边是被动,所以改成sb be considered to be ,这里to be 可以省略.