28．By 16:30, was almost closing time, nearly all the paintings had been sold.
(A)which
(B)when
(C)what
(D)that

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詳解 (共 1 筆)

#1202423
从后面的closing time打烊时间, 停止营业时间可以得知此句是在谈时间，但是此句中缺少主语，前面又有一个逗号，所以可以确定这里是一个非限制性定语从句，用which。
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