题目内容
— Has Sam finished his homework today?
— I have no dea He ________ it this morning.
[ ]
A．did
B．has done
C．was doing
D．had done
答案：C
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— 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 |