I regret having left the work unfinished ,I_everything ahead carefully.A.should plan

问题描述:

I regret having left the work unfinished ,I_everything ahead carefully.A.should plan
B.planned C.must plan D.should have planned 答案是D其他的为什么不行,

should have 表示本来应该做什么,而没有做.
其他三个都没有表示这个意思.所以只有D正确.