题文
While my brother _______ football with his friends yesterday, my sister _______ her homework.
| A．was playing; did | B．played; was doing |
| C．was playing; was doing | D．played; did |
While my brother _______ football with his friends yesterday, my sister _______ her homework.
| A．was playing; did | B．played; was doing |
| C．was playing; was doing | D．played; did |
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