问题描述：
高中英语主语从句
It is uncertain ____ side effect the medicine will bring about,although about two thousand patients have taken it.A.that B.what 不要给我说about后面缺少成分,因为它的成分在前面,是side effect,也就是the medicine will bring about side effect,为什么不能选a?
It is uncertain ____ side effect the medicine will bring about,although about two thousand patients have taken it.A.that B.what 不要给我说about后面缺少成分,因为它的成分在前面,是side effect,也就是the medicine will bring about side effect,为什么不能选a?
问题解答：
我来补答展开全文阅读