You should never base anything on a theory that _________ impractical in practice. A. is proved B. p...
2023-01-17 11:27:59 29次 2010-2011学年湖南省长沙市高三第三次月考英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
You
should never base anything on a
theory that _________ impractical in practice.
A. is
proved B. prove C.
proves D. proved
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