Question

【题目】It’s difficult for parents with young children _______ public transportation.

A. used B. to be used C. to use D. using

Answer 1

【答案】C

【解析】句意：对于带小孩的父母来说使用公共交通很难。used过去式；to be used动词不定式的被动形式；to use动词不定式；using动名词。此题考查动词不定式作主语。It为形式主语，动词不定式作真正主语。故答案为C.