题目内容
16. He had already learned the news. I ______ the trouble to phone him about it.
| A.needn't have taken | B.could have taken |
| C.should have taken | D.mustn't have taken |
A
略
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题目内容
| A.needn't have taken | B.could have taken |
| C.should have taken | D.mustn't have taken |