Don't put off till tomorrow ____you can do today.A.What B,that c.which D when.

问题描述:

Don't put off till tomorrow ____you can do today.A.What B,that c.which D when.
这个题目我觉得它的句意已经完整了,今日事今日毕,所以感觉选B,那为什么正确答案应该是A呢.

很简单 do是不及物动词 也就是说后面肯定要跟sth.
这里what指代的sth.提前了