-What are you going to do this winter holiday?

问题描述:

-What are you going to do this winter holiday?
-I ____ yet.
A.don't decide B.didn't decide
C.haven't decided D.won't decide
C 为什么其它3个不行?

现在完成时,表示仍然在考虑中.状态的持续
你打算寒假做什么
我还没有决定(仍然在想),只有现在完成时才能达到这种效果.