题目内容：

It is almost unbelivable that a gentleman as he is_____ do such nasty thing to the lady
答案是should 为什么?...最好有情态动词的相关用法 PS take the charge of 和take hold of 同样表示控制时有什么区别

优质解答

这是情态动词的用法,should用在句中,表示意想不到的情况,出乎意料.比如：All of us can't believe he should pass the exam.should 还有最常见的意思是：应该做...,比如：You should be polite to your teachers...