— Has Sam finished his homework today? — I have no idea. He ________ it this morning. A．did B．was do...
2023-01-14 06:07:16 145次 2011-2012学年山东省兖州市高三入学摸底考试（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
— Has Sam finished his homework today?
— I have no idea. He ________ it this
morning.
|
A．did
|
B．was doing
|
C．has done
|
D．had done
|
本题链接：
