考试
2020-03-13 23:07:22

4126 Jefferson always made on-

题目描述

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



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!

答案解析

参考答案:D

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