问题补充:
—May I go out to play soccer ball?
—I’m afraid not. You can’t play you have finished your homework.
A. after
B. when
C. of
D. unless
答案:
A. after
B. when
C. of
(答案→)D. unless
解析:A. after在…之后B. when当…时候 C. of…的D. unless除非;句意:我可以出去踢足球吗?恐怕不行,你不能去踢,除非你完成了你的家庭作业。故选D.