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Jefferson always made on－the－spot survey ______ he based his conclusion.

2020-09-07 09:18:35 学历考试 阅读

问题详情

A. which

B. from which

C. in which

D. on which

请帮忙给出正确答案和分析，谢谢！

参考答案

题库： 高中 英语
考点：