As you sleep, the headband

A．analyses your sleep cycle every 90 minute

B．records the time when you fall into deep slee

C．communicates wirelessly with a compute

D．measures the electric activity of your brai

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1 What should the sleeper do to make the device work?

A．He should press the snooze button in tim

B．He should turn on the microprocessor in the cloc

C．He should set the latest time for waking u

D．He should adjust his headban

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2 The ideA．of making such A．clock was developeD．by A．group of

A．students at Brown Universit

B．teachers at Brown Universit

C．sleep-deprived scientist

D．former engineers at Axon Sleep Research Laboratorie

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3 The worD．"prototype" （paragraph 5） means

A．"form".

B．"model".

C．"brand".

D．"cycle".

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