It is uncertain____side effect the medicine will bring about，although about two

题型：不详难度：来源：

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

解析

B【命题立意】考查主语从句的引导词。
【解题思路】句意为：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 意为“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，what在本题中形容词，意为“什么样的”，起修饰作用。