The passenger was very impolite to the conductor, , of course , made things even worse.A.

发布时间：2020-08-16 12:47:40

The passenger was very impolite to the conductor,      , of course , made things even worse.
A. who 　　　
B. whom 　　　　
C. which
D. what

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A. who 　　　
B. whom 　　　　
(答案→)C. which
D. what
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