问题

I haven’t finished my homework yetI my mother with the housework all day yesterday

A:helped
B:have helped
C:was helping
D:have been helping

正确答案是：

同类题型

I regret________you John hbelieve my ears.He’s such a fine worker.

I have guitar, but I can’t play____guitar well.

will you be at the party tonight—Yes, but I have so much homework to dothat I really__________

面有关文学常识的表述，不正确的一项是（）

Our country ______ great changes in the last 30 years and it is no longer it used to be.