问题

My mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it

A:will do
B:is doing
C:does
D:had done

正确答案是：

同类题型

Do you know our home town at all? — No, this is the first time I _____ here

Who are you goingwith –____________________

You can find ___ difficult to learn English.

This question sounds _______ than that one.

Batteship is________film I have ever watched.I have never watched________one.