. 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
网友回答
A. that
(答案→)B. what
C. how
D. whether
解析:本题考查主语从句的引导词。根据句意:尽管大约有两千名病人服用过这种药物,但是,它会带来什么样的副作用还不确定。side effect意思是“副作用”,还原主语从句中的主干是the medicine will bring about side effect。故选择what,形容词“什么样的”,起修饰作用。