It is by no means clear the president can do to end the strike.(2012·新课标全国,24)
A. how
B. which
C. that
D. what
网友回答
A. how
B. which
C. that
D. what
解析: D
解析 it是形式主语,空格后是一个主语从句,从句中的谓语动词do缺少宾语,此处所填单词既要引导主语从句,又在从句中作宾语,四个选项中有此功能的只有what。句意为:总统能采取什么措施来结束这场罢工根本不为人所知。