单项选择题

Which of the following measures can help you sleep better

A．Staying up late.
B．Taking a hot bath.
C．Having late meals.
D．Traveling between time zones.
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单项选择题
Sleep defensively means that ______.
A．people should go to a doctor and have their problems diagnosed
B．people should exercise immediately before going to bed every night
C．people should sacrifice other things to get enough sleep if necessary.
D．People should give up going to bed and going up at the same every day.
单项选择题
For our bodies to function properly, we should ______.
A．sleep for at least eight hours per night
B．believe that we need less sleep as we age
C．adjust our activities to the new inventions
D．be able to predict the rhythms of our biological clocks
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