— I called you this morning, but nobody answered it.
— Oh, we ______ some running in the park.
| A．are doing | B．were doing |
| C．have done | D．did. |
— I called you this morning, but nobody answered it.
— Oh, we ______ some running in the park.
| A．are doing | B．were doing |
| C．have done | D．did. |
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