问题
选择题
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
答案
答案：B
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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
答案：B