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—You look rather tired today.

—_____ not to miss the 4:20 flight, I didn’t dare to close my eyes.

A.Having reminded B.Reminded

C.Being reminded D.Reminding

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Are you too old for fairy tales? If you think 1. , Copenhagen is sure to change your mind.

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I’ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes(基因) on and had genes off.

In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only “reads” the part of this handbook it needs at any given moment.

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C. When genes are up regulated, they do good to health; when genes are down regulated , they do harm to health.

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