单项选择题

If a person finds getting up early a problem, most probably ______.

A．he is a lazy person
B．he refuses to follow his own energy cycle
C．he is not sure when his energy is low
D．he is at his peak in the afternoon or evening

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单项选择题

If one wants to work more efficiently at his low point in the morning, he should ______.

A．change his energy cycle
B．overcome his laziness
C．get up earlier than usual
D．go to bed earlier