单项选择题

Passage Three

A．Scientists.
B．The general public.
C．Teachers at the kindergarten.
D．Children with Attention Deficit Disorder
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单项选择题
A．Sleep is highly variable, and wears out with age.B．Falling asleep is a gradual process.C．Sleeping less will help you lose weight.D．People need to sleep eight hours a day.
A．Sleep is highly variable, and wears out with age.
B．Falling asleep is a gradual process.
C．Sleeping less will help you lose weight.
D．People need to sleep eight hours a day.
单项选择题
A．Stay off work. B．Drink plenty of liquids.C．Eat a lot of vegetables and fruit.D．Postpone your exercise when sick.
A．Stay off work.
B．Drink plenty of liquids.
C．Eat a lot of vegetables and fruit.
D．Postpone your exercise when sick.
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