题目内容

19．Some passers-by witnessed the car accident  _______  five passengers were killed，a baby included．（　　）
A．thatB．whichC．in whichD．in that

分析 一些路人目睹了这起车祸，在车祸中，有五名乘客丧生，其中包括一个婴儿．

解答 答案：C．
本句中先行词the car accident，定语从句中缺少状语成分，结合先行词可知用in which来引导，相当于where．D项结构错误，介词加关系代词指物时用which，指人时用whom；that和which在从句中只能用作主语或定语，不能作状语；故选C．

点评 在定语从句中，关系副词=介词+关系代词which；同时要分析定语从句的句子结构，如果句子很完整就使用关系副词，如果句子中缺少主语，宾语，表语或者定语就使用关系代词．

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B．To select qualified agriculture graduates．
C．To clarify a recent blog posting．
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A．the government will cover production costs
B．global food supplies will be even lower
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