问题 选择题

The machine has been made easier for it____.

A.to operate

B.operated

C.being operated

D.to be operated

答案

答案:D

考察不定式的复合结构。不定式的复合结构:For sb to do sth;本题从语义上来说又是被动语态,故D正确。

材料分析题
单项选择题