This question is hard to ( )

题目

This question is hard to ( )
A.be answered B.answer
为什么选B不选A

答案

英语中有些形容词,如easy,difficult,hard,dangerous等,后面接动词不定式时,动词不定式往往与主语构成动宾关系,同时,它可以借助it来做形式主语.上面这个句子可以换成以下说法：This question is hard to answer.=To a...