He left here for Beijing in 1998 ,____I have heard nothing from her.A．since then
题型：不详难度：来源：
He left here for Beijing in 1998 ,____I have heard nothing from her.| A．since then | B．since when | C．from then on | D．after that |
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答案
| B |
解析
试题分析：考查定语从句：句意：他在1998年离开这儿去了北京，之后我一直没有他的消息。从现在完成时判断是AB选项，因为两句话之间没有连词，所以是定语从句，A不能引导定语从句，since when能引导定语从句，故答案为B。
点评：这是特殊的定语从句，介词一般接whom/which,但是带有 then, now 的短语，引导定语从句时，要将 then, now 变为 when； |
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