摘要：22．---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
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---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
－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
---- 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 |
—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 |
—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 |