I _ all the housework at home,but recently I have been too busy to do it.A.do B.did请问为什么?

I _ all the housework at home,but recently I have been too busy to do it.A.do B.did请问为什么?
I _ all the housework at home,but recently I have been too busy to do it.
A.do B.did
请问为什么?

I _ all the housework at home,but recently I have been too busy to do it.A.do B.did请问为什么?
因为前一句没有明确的一般过去时的时间状语,又根据后面句子判断,前句是经常的、一般性的动作,故排除B.

因为前面讲的是经常性的或习惯性的动作，故要用一般现在时。