Question

He failed in the driving test again. He_______.

1. A.
   must have disappointed
2. B.
   must have been disappointed
3. C.
   might be disappointed
4. D.
   couldn’t be disappointed

Answer 1

B
考察时态，根据题意他在驾照考试中失败了。他一定很失望。可知是对已发生事情的判断，瞬间动词失望不能用于完成时态，故需用瞬间动词的被动语态，选B。