After ____ seemsd a long time,he managed to work out this problem.

问题描述:

After ____ seemsd a long time,he managed to work out this problem.
A that
B whether
C which
D it
seemed

朋友,
答案应该是 what.你的四个选项全都不对啊.请你核对一下.
After WHAT seemed a long time,he managed to work out this problem
====He didn't work out this problem until a long time had passed.
what==something that哦是B是what打错了谢谢