问题补充：
------- Jack, you erase the blackboard today, ?
------- But I did it yesterday.
A. will you
B. do you
C. would you
D. don’t you
答案：
(答案→)A. will you
B. do you
C. would you
D. don’t you
解析：：考查反义疑问句。Jack, you erase the blackboard today是一个祈使句，只是把主语给出来了。祈使句的反义疑问句使用will you,或者won’t you.故A正确。
