—I didn’t see you at the beginning of the party last night．
—I________on nay biology report at that time．
| A．worked |
| B．work |
| C．was working |
| D．am working |
相关试题
My science teacher told us that the earth around the sun.
| A．move | B．goes | C．went | D．travel |
---Would you mind basketball here?
---Sorry. We’ll go and play it on the playground.
| A．playing | B．not playing | C．play | D．to play |
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