I ________ my homework for four hours, but I am not sure whether I can hand it in tomorrow. A. have ...
2022-10-16 14:01:49 174次 2016届广东省高三上期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I ________ my homework for four hours, but I am not sure whether I can hand it in tomorrow.
A. have done B. have been doing
C. had been doing D. had done
本题链接：
