[单项选择]The number of daylight hours A affects the performance of workers in restaurants. B influences animal feeding habits. C makes animals like hamsters more active. D prepares humans for having greater leisure time.

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[单项选择]Copyright of music may harm the majority of performers in that ______.

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[单项选择]Daylight Saving Time begin at 2

A. A．m. ______ in the United States every year. on the last Sunday of AprilB. on the first Sunday of AprilC. on the last Sunday of MayD. on the first Sunday of May

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