银登中心怎么样:选择题一题

来源:百度文库 编辑:高校问答 时间:2024/07/03 09:21:36
I try to find ____that prevents so many people from taking part in the program.
A.why it does B.what it does C.what it is D.why it is
希望解释详细点,谢谢!

c
it 是形式主语,也就是代替后面that从句

整句意思,我试图找到是什么让这么多人不参加这个项目