—Can you tell me if Tom has finished his homework?
—I've no idea. He ________ it this morning.
| A．has being doing | B．had done |
| C．is doing | D．was doing |
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—Can you tell me if Tom has finished his homework?
—I've no idea. He ________ it this morning.
| A．has being doing | B．had done |
| C．is doing | D．was doing |
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