摘要：18．Why didn’t the mall go to the theatre? A．Because the woman didn’t have a phone． B．Because he had some unexpected friends． C．Because it was already eleven o’clock．
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There was a lot of fun at yesterday's party. You _____ come, but why didn't you?
- A.must have
- B.should
- C.need have
- D.ought to have
---______ sweep the classroom yesterday？
---I was playing tennis with my friend．
- A.Why not
- B.Why didn't
- C.Why don't
- D.Why didn't you
— why didn't you try your best to get on the bus?
— I tried to,but ________ I could,it started moving．
- A.until
- B.when
- C.before
- D.after