It's March, 2050. Frank and Mary Smith wake up in their comfortable house in the morning and turn on the bedroom computer to get the latest news. They get used to reading The Times over the years. The only difference is that they changed to electronic newspapers many years ago.

    After breakfast, as they watch the screen, Mary orders the household robot to make coffee for them. Frank is a computer engineer, working for several companies. He goes into the study to take part in a video conference with his partners around the world.

    Mary takes a quick look at the shopping channels at home before beginning the video call to talk to her assistant. She also has a job and she is doing medical researches.

    Frank and Mary have one daughter, Louise, who also has her own work station at home. She goes to school only one day a week, mainly to play with other students. Louise is studying Chinese at present. Chinese has become an important language in the world.

    According to the family doctor, Louise will live to at least 130 years old. Her wish is to work for a few decades(十年)and then spend her time on music and painting.

Einstein has to speak at an important science meeting.  On the way there, he tells his driver that looksa bit like him, "I'm sick of all these meetings. I always say the same thingsover and over!"

The driver agrees, "You're right. As your driver, I attendall of them, and even though I don't know anything about science, I could give thespeech in your place. "

"That's a great idea!" says Einstein. "Let's exchangeour places then!"

So they exchange clothes. As soon as they arrive, the driverdressed as Einstein goes on stage and starts giving the usual speech, while thereal Einstein, dressed as the car driver, attends it.

But in the crowd, there is one scientist who wants to show offand thinks of a very difficult question to ask Einstein, hoping he won't be ableto answer. So this guy stands up and cuts in the speech by raising his very difficultquestion. The whole room goes silent, holding their breath, waiting for the answer.

The driver looks at him, dead in the eye, and says, "Sir,your question is so easy that I'm going to let my driver answer it for me."

①Eating good food and getting proper exercise are important to stay healthy. Getting enough sleep is important, too. Experts say that teenagers between the ages of 15 and 20 need 8 to 10 hours of sleep each night. 

②Your body needs to take a rest from all the activities it has done during the day. Your brain needs a rest, too. You are likely to get sick easier without enough sleep. 

③You have a "24-hour clock" inside your body that tells you when to be awake and when to go to sleep.  ▲  Blue light that comes from the Sun tells your brain to keep you awake during the day. When there is no blue light at night, the brain tells the body that it's time for sleep. 

④There are many things that stop the brain from telling your body when it's time to sleep. One of these is blue light at night. Today, people spend a lot of time watching television or looking at screens on computers or smart phones. These devices (装置) give off blue light. If you look at them at night, the blue light can trick your body into thinking it's daytime. Then it is more difficult to go to sleep.

⑤What should you do to get good sleep? Experts say that you shouldn't look at screens that give off blue light for at least one hour before going to sleep. 

⑥ Do not watch TV or use anything with a computer screen in bed. If you need to do something to fall asleep, it is better to read a book. Also, keep your bedroom as dark as you can. This will help you sleep well. 

Henry is my best friend. We all like him because he is funny. He can play many i{#blank#}1{#/blank#} . When he is with his friends, he often plays for them. My birthday is {#blank#}2{#/blank#} October 8th, and Henry is three days younger than I. Today he has a big birthday party at home. Many friends come to his party. Henry's mother {#blank#}3{#/blank#} (cook) a lot of food for them. Everyone gives a beautiful p{#blank#}4{#/blank#} to him. Sally gives him an English dictionary because Henry enjoys {#blank#}5{#/blank#}(learn) English. Bob gives Henry a guitar because he likes playing the guitar very much. My gift is a book about music. At the party, Henry plays the guitar and he also plays the piano. We sing at l{#blank#}6{#/blank#} ten songs and play some interesting games. Some people love playing b{#blank#}7{#/blank#} games like chess. Some people are interested in the balloon show in the garden. It's quite {#blank#}8{#/blank#} (usual) for the little kids so they are very curious (好奇的). After watching the show, we stand in a q{#blank#}9{#/blank#} to get the balloon toys. At the end of the party, we share Henry's birthday cake together. Then we start to dance. We have fun {#blank#}10{#/blank#} (dance) with friends. We have a good time today. 

There are seven days in a week. Cindy's favorite day is Friday. Because there is her favorite class on Friday and she doesn't need to go to school the next day. At 7:30 on Friday morning, she has her first class. It is an English lesson. She likes English. It's very easy for her. At 8:25 a. m, she has a Chinese lesson. She isn't good at it. Then she has math at 9:50 a. m. She thinks math is difficult. Next she has history at 10:35 a. m. This is her favorite class. She can learn about the past. 

In the afternoon, she has P. E. at 2:00 p. m. Her P. E. teacher is strong and tall. He is friendly. Students often play football in P. E. class. Then she has music at 3:50 p. m. Music is interesting. She and her classmates all like it. After music class, she has a class meeting. She and her classmates talk about many things in the meeting. School is over at 4:30 p. m. What a happy Friday!

Dear Lin Tao，

I am writing to you in English. I hope you can understand（懂）it. 

I love studying in London and I have many new friends. Most of them are my classmates. From Monday to Friday，we have English，math，physics and P. E. in the morning. I like English and physics，because they're interesting. I don't like math. It's too boring. At noon，I have to have lunch at school because my home is far from（远离）my school. We usually have two classes in the afternoon﹣art and politics. We finish our classes at 3 ：30 p. m. After school，my friends and I always play football on the playground. And then we go home by bus. 

On weekends，we have no classes. We often go to the park and sometimes we go to the movies in the evening. We see movies twice a month. I like some famous（著名的）actors like Jackie Chan. 

Oh，I have no time to write more. Please write back soon. 

Best wishes，

Wang Gang