He ______ get up at five o’clock in the morning.

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问题 He ______ get up at five o’clock in the morning.

选项 A、used to
B、is used m
C、has been used to
D、has used to

答案A

解析 英语中used to do表示过去常常做某事,其中的to是动词不定式符号。be used to doing something表示习惯于做某事,其中to是介词。
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