The old man              in front of the door, waiting for his children to come back home.

A．was used to sit
B．is used to sit
C．used to sit
D．used to sitting
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科目：初中英語 來源：0113 月考題 題型：單選題

The old man              in front of the door, waiting for his children to come back home.
[     ]
A．was used to sit
B．is used to sit
C．used to sit
D．used to sitting

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