Join another group and take turns giving your presentation Did you give similar reasons? What was different?

(Tham gia nhóm khác và lần lượt thuyết trình Bạn có đưa ra những lý do tương tự không? Có gì khác biệt?)

Read the article. Match the title to each paragraph.

(Đọc bài văn. Nối tiêu đề đúng với mỗi đoạn văn)

a. A twenty-first century problem

b. The problem of light and screens

c. Why do we need to sleep?

1. Why do we steep? One thing we do know is that it's good for our physical and mental health Physically, sleep helps prevent sickness and keeps our body healthy. Mentally, we study and work better when we sleep for about eight hours the previous night.

In this country lack of sleep is becoming a big problem. The average American sleeps less than seven hours a night-that's two hours loss than a century ago. Our modern 24-hour-day lifestyle means that more and more of us are working at different times of the day-and night. We often stay up late into the night, and some of us even work all night and sloop during the day. This is a problem because our body's natural clock is connected with the movement of the sun. If we don't sleep at night for long periods, it can be bad for our health.

But perhaps the biggest problem comes from electric lights and screens. Modern cities use bright LED lights through the night, which changes the way we sleep. In addition, the screens of our computers, tablets, and smartphones all send out blue light. The bluer and brighter the light, the more difficult it is to get tired and go to sleep. As a result, some medical experts suggest that we shouldn't watch more than two hours of television per day, and that we should stop looking at screens (including phones) one hour before we go to bed But how many of us will take this advice?

Complete this summary using the words from the article.

(Hoàn thành bài tóm tắt sử dụng từ từ đoạn văn)

Sleep is good for physical and (1) _mental health. It helps stop (2)____ and keeps us healthy. We also study and work ___when we sleep for (4)___ hours. But in the twenty-first century, we aren't getting enough sleep. One reason is that we stay up (5)____or_(6)___all night. Another reason is that (7)____ light from screens keeps us awake. As a result, medical experts advise us to stop looking at screens (8)____ hour before bed.

Read again. Answer each question. Circle Yes, No, or Doesn't say

(Đọc lại đoạn văn một lần nữa. Trả lời mỗi câu hỏi. Khoanh tròn Yes, No hoặc Doesn’t say

1. Is sleep good for our health? Yes       No          Doesn't say

2. Do we study and work better with eight hours of sleep?  Yes     No     Doesn't say

3. Do Americans sleep less than people of other nationalities? Yes       No        Don’t say 

4. Does the movement of the sun affect our natural clock?  Yes      No       Doesn't say

5. Does blue light affect our sleep? Yes     No         Doesn't say

6. Should we check our phones before we sleep?  Yes          No        Doesn't say 

7. Does the writer think we will take the advice of medical experts?  Yes          No        Doesn’t  say

Do you often look at a screen (e.g., a phone or laptop) before you go to sleep? Do you think it's bad for your health? Why?

(Bạn có thường nhìn vào màn hình (ví dụ: điện thoại hoặc máy tính xách tay) trước khi ngủ không? Bạn có nghĩ rằng nó có hại cho sức khỏe của bạn? Tại sao?)

List all the reasons why sleep is good for you. Use ideas from the article and add two of your own ideas,