Theoldmanisusedto____________earlyinthemorning.A.exerciseB.exercisingC.exercisedD.exercises
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题目内容：
The old man is used to ____________ early in the morning.
A.exerciseB.exercisingC.exercisedD.exercises
优质解答
B.be used to doing sth-----习惯于做某事 be used to do sth.---被用来做某事
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