It is uncertain side effect the medicine will bring about, although about two thousand patients have...
2023-01-18 15:27:24 161次 2010-2011学年河北省高三上学期期中考试英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is uncertain side
effect the medicine will bring about, although about two thousand patients have
taken it．
A．that
B．what C．how
D．whether
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