问题
选择题
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
答案
A
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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