◎ 题干
The art centre is _____ used to be a factory, _____ millions of tractors were made.

A. what; where
B. where; where
C. what; which
D. where; which
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The art centre is _____ used to be a factory, _____ millions of tractors were made. [ ]A. what; where B. where; whereC. what; whichD. where; which …”主要考查了你对  【连接代词】【关系副词】【非限制性定语从句】【表语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。