问题补充:
----Could you please sweep the floor?
---. I have to do my homework first.
A. Yes, sure.
B. Why not?
C. Sorry, you can’t.
D. Sorry, I can’t.
答案:
A. Yes, sure.
B. Why not?
C. Sorry, you can’t.
(答案→)D. Sorry, I can’t.
解析:句意:--请你扫地好吗?--对不起,我不能。首先我必须做我的家庭作业。分析答语的下文,我必须做作业,说明是拒绝了要求,否定回答为Sorry, I can’t.故选D