问题描述：
It is uncertain side effect the medicine will bring about,although a
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
为什么不能选D捏 从句难道不能是倒装句?
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
为什么不能选D捏 从句难道不能是倒装句?
问题解答：
我来补答展开全文阅读