Sleep

Babies sleep about eighteen hours a day．Mrs. Thatcher and Napoleon both said they only needed to do it three or four hours a night．Sleep．No one can live without it．But how much do we really need?

Research（研究）by the National Sleep Foundation in Washington says that we all need eight hours' sleep every night．Scientists have found that people who sleep for less than six and a half hours a night are more often ill than people who sleep for eight hours．Going without sleep also increases（增加）the chance of serious illness．Workaholics（工作狂）who sleep for less than five hours often die young，and do less well at work．

The scientists found that adults（成年人）usually sleep for seven hours a night，with 32% sleeping less than six hours．

It also says that the idea that we need less sleep as we get older is completely untrue．“People have no idea how important sleep is to their lives，” Dr Thomas Roth，director of the Foundation says．“Good health needs good sleep．”

“But not too much of it，”says Professor Jim Horne of Loughborough University．“Sleep is like food and drink，”he believes，“you would always like to have a little bit more，but that doesn’t mean you need it．” Professor Home studied a group of people who could spend as many hours as they wanted in bed，after ten hours they didn't find it any easier to get up in the morning．And people who sleep for more than nine hours a night die younger than people who usually sleep for seven or eight!

根据短文内容，选择正确答案。

1．How many hours a day do babies sleep?        ．

A．8 hours                B．3 hours                   C．4 hours                  D．18 hours

2．It's                   for your health to work without sleep．

A．good                   B．healthy                    C．bad                        D．useful

3．The word “it” means                in the sentence “But not too much of it”．

A．idea                     B．sleep                       C．work                     D．study

4．Professor Horne found it was not             for people to get up in the morning after ten hours' sleep．

A．easier                  B．happier                   C．more important       D．more difficult

5．The passage（文章）is about                 ．

A．spots                   B．food                       C．sleep                      D．drink

Dear Peter,

How about you study? It’s Sunday today I’m writing a letter to you. I’m going to tell you .I’m going to tell you about things in Beijing.

Beijing is different from London. In our country, we drive on the left side of the road, but here people drive on the right side. Most people go to work by bus or by bike. The rush hours(高峰时间) are from seven to nine in the morning and five to seven in the afternoon. People in China work around eight hours a day, five days a week. They usually begin to work at eight in the morning, and rest on Saturday and Sunday.

I have Chinese classes every morning from Monday to Friday. The students in our class are from many countries. We’re all working hard and friendly. The Chinese students are ready to help us with our Chinese .We also help them a lot with their English. We’re getting along very well（相处的融洽）

That’s all for today. Please write tome soon.

Yours,

Susan

1.Susan is probably from_____

2.People drive on _____in London.

3.The rush hours a day in Beijing usually last______