问题
Shall we go out for aswim? —Sorry, I can’t. I ______ housework for my mother now.
A: amdoing
B: isdoing
C:aredoing
D: did
B: isdoing
C:aredoing
D: did
正确答案是：
同类题型
_________ is it to your home town from here— Well, it takes over three hours to get there by car.
Look at that girl. Is it Susan–No, it _______ be her. She has gone backto her home town .
Would you please give him the paper the moment he ____?— No problem
_________difficult questions the teacher is asking! Only a few students can answer them!