题目内容
---Has Sam finished his homework today?
---I have no idea. He_____ it this morning.
A. did B. has done C. was doing D. had done
C
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相关题目
— 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 |