问题

Did you hear that Jack used to be a policeman for two years—You’re kidding! He ______, for he’s too short.

A:can’t be
B:can’t have been
C:may not be
D:may not have been;

正确答案是：

同类题型

Although I often send e-mails to Tom, I have never seen him _____

What have you done these days— I’ve read all the books _____ you gave mebecause they are the best ones _____ are on the subject

Last week he was caught stealing in the supermarket，_________ his age，the police have decided not to charge him

Last year, Linda made __________ her brother did though he had a better job. [ ]