题目内容
What a pity! I _____ in London for three more days, but something urgent needed to be dealt with back in Beijing.
| A.must have stayed | B.could have stayed | C.may have stayed | D.needn’t have stayed |
B
略
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题目内容
| A.must have stayed | B.could have stayed | C.may have stayed | D.needn’t have stayed |