单选题

13、The factory ______ two years ago was equipped with the most advanced machinery.

A
where I worked there
B
which I worked
C
in which I worked
D
where I worked in
参考答案  
C
题目详解：
题目考查定语从句的用法。句子中 "______ two years ago" 是修饰 "The factory" 的定语从句，先行词是 "The factory"，表示地点。选项分析如下：- A. "where I worked there" 错误，因为 "where" 已经表示地点，不需要再加 "there"。- B. "which I worked" 错误，因为 "which" 引导定语从句时需要作主语或宾语，而这里缺少介词。- C. "in which I worked" 正确，"in which" 等同于 "where"，表示在工厂里工作。- D. "where I worked in" 错误，因为 "where" 本身已表示地点，再加 "in" 造成语法重复。记忆小技巧："地点关系词用where，代替介词in更简洁。"
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根据which引导的从句而定，当从句中需要以in作介词时使用。
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equipped配备