I telephoned him twice and I couldn’t get through to his home. The line must have been out of order,（）
A: doesn’t it
B: wasn’t it
C: mustn’t it
D: hadn’t it
A: doesn’t it
B: wasn’t it
C: mustn’t it
D: hadn’t it
举一反三
- —I telephoned her many times, but I couldn’t get through to her home.—I think the line must have been out of order, _____________________? A: don’t you B: do you C: wasn’t it D: hadn’t it
- —You must have met him the other day. —Oh, no, I ________. A: hadn’t B: mustn’t C: haven’t D: didn’t
- The girl must have been reading at this moment last Sunday, ______ she A: wasn't B: didn't C: mustn' t D: hadn't
- If I ______ so busy last week, I would have gone to visit him in the hospital. A: am not B: wasn't C: haven't been D: hadn't been
- I wish he ____________ here yesterday. A: isn't B: wasn't C: wouldn't have been D: hadn't been