He __________ some cooking at that time, so ___________me.
| A．did, heard | B．was doing, heard |
| C．was doing, didn’t hear | D．did, didn’t hear |
He __________ some cooking at that time, so ___________me.
| A．did, heard | B．was doing, heard |
| C．was doing, didn’t hear | D．did, didn’t hear |
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