题目内容：

This question is hard to _ a.be answered b.answer
This question is hard to _ a.be answered b.answer

优质解答

B
注意,此句型中的主语是句尾不定式的【逻辑宾语】,所以不可以选择不定式的被动式
再如：
The are easy to get along with.
The sentence is difficult to translate.
The apple is good to eat.