题目内容
（浙江卷9）. 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
B
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题目内容
（浙江卷9）. 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
B