Getting the right amount of sleep is important for your health. Sleep less can put you at risk of a high blood pressure and heart failure.

But just as too little sleep is bad for you, so too is too much sleep. Those who get more than nine hours per night are 30% more likely to die early, according to a recent study.

The optimum number of hours sleep per night is between seven and eight. Thankfully there are lots of apps and devices out there to help you get get the perfect night’s rest.

White Noise app

White Noise app helps you clear your mind. If you find it hard to sleep, then a white noise app can be extremely helpful.White Noise has more than 40 different sounds from beach waves and heavy rain. That can help you sleep quietly.

Misfit Shine

The Misfit Shine is a special watch. It will also track your sleep. The device will automatically detect when you've gone to sleep and measure how long and how deep you are under for.

There's even a smart alarm which will wake you up when you're in your lightest sleep so you feel more refreshed.

Philips Wake-up light

The light slowly gets brighter to wake you up gently.If you struggle to get to sleep you’ll probably find it hard to wake up. That’s where a wake-up light can be incredibly useful. This one mimics the sunrise so that you wake up more naturally. It slowly gets brighter and brighter.

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1.What’s the passage mainly about?

A How to be healthy

B How to sleep well

C Technology can help you sleep well.

D Some advanced devices.

解析：选C。C 主旨大意题。根据第3段第2句“Thankfully there are lots of apps and devices out there to help you get get the perfect night’s rest.”可知，这是文章的主题句，全文以高科技为中心展开写作。

2.How many devices does the passage mention?

A 1

B 2

C 3

D 4

解析：选C。C 细节理解题。根据文章3个加粗的短语可知，提到了三样高科技产品。

3.How many hours should you sleep according to the passage ?

A 42130

B 42193

C 42257

D 42320

解析：选B。B 细节理解题。根据文章第3段第1句“The optimum number of hours sleep per night is between seven and eight.”可知。

4.Misfit Shine is a kind of________.

A phone.

B watch

C light

D music

解析：选B。B 细节理解题。根据文章第5段第1句“ The Misfit Shine is a special watch”可知。

5. If you don’t have enough sleeping time, you may have_______.

A a heart failure.

B a toothache

C a cold.

D a fever.

解析：选A。A 细节理解题。根据文章第1段第2句“Sleep less can put you at risk of a high blood pressure and heart failure.