问题标题:
【After____seemsdalongtime,hemanagedtoworkoutthisproblem.AthatBwhetherCwhichDitseemed】
问题描述:

After____seemsdalongtime,hemanagedtoworkoutthisproblem.

Athat

Bwhether

Cwhich

Dit

seemed

史华明回答:
  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.   AfterWHATseemedalongtime,hemanagedtoworkoutthisproblem   ====Hedidn'tworkoutthisproblemuntilalongtimehadpassed.   what==somethingthat
倪江生回答:
  哦是B是what打错了谢谢
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