问题描述：
这题:This is the factory ( ) they worked 2 years ago. A. where B. who C. that D. which--选D对吗?谢谢
This is the factory they worked 2 years ago.
A. where B. who C. that D. which
This is the factory they worked 2 years ago.
A. where B. who C. that D. which
问题解答：
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