Imagine you're enjoying dinner with your friends at a nice restaurant. You're having a great time when suddenly you hear a phone ringing at the table next to you. A man takes out his phone and starts talking about problems he's having with his girlfriend. He keeps talking for almost ten minutes! How will you feel? Maybe you will feel uncomfortable, but you can do nothing about it. This happens all the time, not only in restaurants, but also on buses, at the cinema, everywhere!

Cell phones are useful in our daily lives. But be careful not to be noisy phone users and disturb others. You are supposed to control your own behavior. Here are a few rules:

Follow the rules! When you're in public places and see a sign that says "Turn off cell phones", don't use your phone. If you are allowed, speak softly for a short time and try to keep away from other people.

Phone off! Never make calls in a theater, when you are watching a movie or enjoying a concert.

Pay attention! Talking on a cell phone while driving is dangerous. And watch where you're going when you're walking down the streets and talking on the phone.

As more people use cell phones, things are going to get worse. So, the next time you're getting ready to make a call, stop and consider the people around you. 

    Stracey Truman works in the dining hall of Kingston Elementary School in Virginia, the USA. Recently, she has ra lot of letters. In the letters she was praised for her practice of writing messages of hope on bananas.

    Early each morning, when students are still at h, Truman(坐下) at her desk and picks up a banana. Actually, 60 bananas or more. Then Truman writes message of hope on each banana, such as "Your future is bright." and "Never  (放弃) . While doing that, she's very patient.

Truman(过去常常) do this for her kids. Then she decided that the kids at Kingston might be iin the idea as well.

    "Although the banana peels might be (扔掉）after lunch, the messages will [riˈmein] long after school is over. That's most valuable thing. The won the banana peels can help students have more courage," said Sharon Shewbridge, the headmaster of Kingston.

So far, it has become very popular among kids. Kids who blunches from home are also coming to school with talking bananas from their parents. When the Dole Fruit Company heard about Truman's efforts, they decided to give bananasthe school, 540 bananas(总共）—one for every student. At the same time, Truman got some help from parentsfriends. Together they came up sayings and wrote them on each banana.

    " I want them to have a good day in their school life." Truman said.

— It′s________hot ________cold. So Kunming is called "the Spring City".

When a computer works on a group of programs, it can get very hot. Cooling the computer can cost a lot. So some scientists wonder what would happen if the heat from the computer could be used.

Large Internet companies such as Google and Microsoft have thousands of computers. As these computers deal with information, they produce lots of heat, so they need huge cooling systems (系统). These systems send the heat into the air.

A company in Holland (荷兰) thinks paying to make the computers work and then paying again to cool them are a waste of energy So the company developed a special device(仪器，装置)—the e-Radiator.

Boaz Leupe, head of the company, says that e-Radiator works as a heating system and saves money. He explains that the energy is used twice—once to heat the home and once to cool the computer and that the users don't have to pay to cool their computers.

Five home owners in Holland are testing the heating system in their homes.

"We pay for the computer using, so, in that way, home owners get heating for free,"Boaz says.

Jan Visser is one of the home owners. "If you use the computer more, the e-Radiator producers more heat, "he says, "It cannot provide enough heat if you don't use your computer often." But he is ready to try it. It's a great help for his family.

The company says e-Radiators produce heat temperatures of up to 55℃. It says the system could save its users about $440 a year.

—It _____be Tom. He has gone to his hometown to visit his grandparents.