It is by no means clearthe president can

问题选择题

It is by no means clear the president can do to end the strike.

A．how

B．which

C．that

D．what

答案

答案：D

此处it是形式主语，what引导的是主语从句，作真正的主语。What作do的宾语。句意：总统采取什么行动结束这次罢工一点也不清楚。

【考点定位】考查主语从句的连接词。