He failed in the driving test again.He _________.A.must have disapointed B.must have been
问题描述：
He failed in the driving test again.He _________.A.must have disapointed B.must have been
He failed in the driving test again.He _________.
A.must have disapointed B.must have been disappointed
C.might be disappointed D.couldn’t be disapointed
答
选B
must have done表示对于过去的事情的一种推测.somebody be disappointed表示失望.所以后半句的意思是“他一定很失望”为何不选aA里面，没有be动词啊。be disappointed 才表示失望。B选项中的been就是be的过去分词形式。