问题补充:
— Why didn’t you leave school? It’s already eight o’clock.
— Because I my homework yet.
A. wasn’t finishing
B. wouldn’t finish
C. haven’t finished
D. wasn’t finished
答案:
A. wasn’t finishing
B. wouldn’t finish
(答案→)C. haven’t finished
D. wasn’t finished
解析:考查情景交际。“你为什么不离开学校?都八点了。”“因为我还没写完作业。”根据yet提示用现在完成时的否定形式。故选C。