________ mothers couldn’t go to the meeting, because they have gone to Shanghai .
举一反三
- They hurried there only to find the meeting canceled. In fact, they______ at all. A: needn't have gone B: might not have gone C: mustn't have gone D: couldn't have gone
- I saw Mr. Wang a moment ago. He _____ to America. A: mustn’t go B: can’t go C: mustn’t have gone D: couldn’t have gone
- They ______ because the light's on! A: must have gone out B: can't have gone out C: mustn't have gone out D: can't go out
- He ___ to Beijing. I saw him only a while ago. A: cannot have gone B: might not have gone C: couldn't go D: must not have gone
- It's Sunday today. You ______ school. A: didn't need to go to B: needn't have gone to C: mustn't go to D: couldn't go to