“Zeo allows people to unlock this black box of sleep，”says Dave Dickinson，a health­care CEO.

　　Whether any of this actually improves sleep is up to the consumer，who will also need to make lifestyle changes like cutting out alcohol before bedtime or caffeine after 3 pm.

　　For now the company is selling Zeo online only.Dickinson also plans to expand to countries such as Australia，where sleep deprivation approaches U．S.levels.

　　1．Why did the three students imagine a smart alarm clock?

　　A．To earn enough money for a scholarship.

　　B．To wake them up on time in the morning.

　　C．To record the length of their sleep time.

　　D．To improve the quality of their sleep.

　　2．Which is the correct order of how the Zeo device works?

　　a．wake you when you're least sleepy

　　b．scan your brain for sleep signs

　　c．get the Zeo's ZQ score

　　d．show a graph of your sleep pattern

　　e．upload the data to the company's website

　　A．d，b，a，e，c

　　B．b，a，d，c，e

　　C．d，b，a，c，e

　　D．b，d，a，e，c

　　3．The Zeo's ZQ score is connected with ______.

　　A．the quality of sleep

　　B．the length of sleep

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