After __ seemed hours of waiting in line,finally it was our turn to pass the gateway.A.that B.itC.what D.which选C,为什么?

After __ seemed hours of waiting in line,finally it was our turn to pass the gateway.A.that B.itC.what D.which选C,为什么?
After __ seemed hours of waiting in line,finally it was our turn to pass the gateway.
A.that B.it
C.what D.which
选C,为什么?

After __ seemed hours of waiting in line,finally it was our turn to pass the gateway.A.that B.itC.what D.which选C,为什么?
C.What
what引导的从句可以代表一个名词.
what＝sth.that
after后面要加名词,不可加从句.所以用what.
可以参看这道题,两者考察的内容都是what的这个用法.