Mr. Smith            very naughty when he was a boy.

A．used to do
B．used to be
C．used to
B
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科目：初中英語(yǔ) 來(lái)源：廣東省競(jìng)賽題 題型：單選題

Mr. Smith            very naughty when he was a boy.
[     ]
A．used to do
B．used to be
C．used to

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