16.My American friend knows my problem because I ( ) my ideas with him.(本题分数:1 分.)A、 have changedB、 changed C、 have exchangedD、 exchanged

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16.My American friend knows my problem because I ( ) my ideas with him.(本题分数:1 分.)
A、 have changedB、 changed C、 have exchangedD、 exchanged

C have exchanged
exchange 意为交流,交换.change 意为改变,先排除A B
全句为一般现在时,用过去时不妥.排除D
根据句意,我的美国朋友知道我的麻烦,原因是我已经与他交流过想法.
C 完成式结构表示已完成并且对现在产生影响
D 过去式表过去发生,但完全不影响现在发生的事情
希望学习时多加注意
最后,exchange A with B 固定搭配,和B交换,交流A

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