By 16:30,( )was almost closing time,nearly all the

发布时间：2021-02-22 11:15:19

By 16:30,( )was almost closing time,nearly all the paintings had been sold.A.whichB.whenC.what答案给的which,说是因为是非限定性定语从句,但先行词是谁啊?

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先行词就是16:30,也就是说16:30这个时间是关门的时间
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