He disappeared last month, we have heard nothing of him.A. whenB. after whichC. from whi

发布时间：2020-08-16 15:12:56

He disappeared last month,      we have heard nothing of him.
A. when
B. after which
C. from which
D. since when

网友回答

A. when
B. after which
C. from which
(答案→)D. since when
解析：定语从句考查题。根据从句中的时态have heard可知要用介词since。他上个月失踪了从那时起我们再也没有他的消息。
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