Could smells affect your lifespan? Female fruit flies (果蝇) without the ability to smell food live longer than other fruit flies．The sense of smell may be connected to the cellular ageing (细胞老化) process in many other living things  even people．Such connection has recently been found in both worms and flies．For example, scientists found that removing fruit flies' ability to smell made them live nearly 20 percent longer than flies with a sense of smell．

    They confirmed that food smells were the ones most likely to affect ageing, as nutrition (营养) and lifespan are known to be connected in many living things．To test the idea that food smells affect lifespan, they removed flies' ability to smell carbon dioxide, which is produced by some fly foods．They left the rest of the smelling system．

    This action had no effect on male flies, but the females lived 30 percent longer than normal．Removing the ability to smell CO₂ may stop flies getting information about food availability．This could mean that food is not enough, causing processes that encourage flies to survive．Scientists found that the female flies from stored extra fat and that both males and females immune (免疫) to CO₂ were stronger against the stress than normal flies．It is suggested that females may simply be easily influenced by the smells of CO₂ ．

    Scientists point out that people don't know whether ageing and smell are connected in animals and humans．But they clearly experience physical changes after smelling food．

    Welcome to the 26^th century! Cyborg technology is a way of life. People with human brains and artificial (人造的) bodies are everywhere.

    This is the future world shown in the film Alita: Battle Angel.US director James Cameron made the film. The movie came out in the Chinese mainland theaters on Feb 22.

    The story is based on Japanese manga artist Yukito Kishiro's popular manga series of the same name. The main character, a cyborg, is a girl named Alita.

    One day, she wakes up in wreckage and finds that she has lost her memory. Luckily, a doctor saves her. As she starts her new life, Alita finds she has superhuman abilities. She decides to find the truth behind her origin. She started a journey that leads her through a dark world.

    In Cameron's own words, the movie is "not like any of the films that I've done before". Its visual effects are especially impressive. The film's actors used the latest motion-capture (动作捕捉) technology. They wore special suits that record their movements. Later, motion-capture editors use these movements to make special effects. Rosa Salaza plays Alita. She wore a suit with more than 7, 000 pieces and layers. It can capture human movement. The model that was used for her face was changed nearly 5, 000 times to make it more lifelike.

Every morning my father buys a newspaper on his way to work. Every evening my mot looks through magazines at home. And every night, I look at the posters with photos of David Beckham and Yao Ming on my bedroom wall before I go to sleep. Can we imagine life without paper or print?

Paper was first created about 2,000 years ago, and was made from silk, cotton, bamboo and since the 19th century from wood. People learned to write words on paper to make a book. But it those days, only one book could be produced at a time by hand. As a result, they were expensive and rare. And because there weren't many books, few people learned to read.

Then printing was invented in China. When printing was developed greatly at the beginning the 11th century, books could be produced quickly and cheaply. As a result, more people learned to read. After that, knowledge and ideas spread quickly.

Today information can be received online, downloaded from the Internet rather than found in books, and information can be kept on CD ROMs or machines such as MP3 players.

Computers are already used in classroom, and newspapers and magazines can already be read online. So will books be replaced by computers one day? No, I don't think the Yao Ming poster on my bedroom wall will be replaced by a two-metre-high computer!

Sports play a(n)1 part in our life. All over the world, people enjoy sports. Wherever you are, you can2 different kinds of sports or games. Some sports or games can go back to thousands of3 ago, like running and jumping. Chinese kung fu, for example, has a very long history.4 basketball and volleyball are new. People are inventing new sports or games all the time.

Sports help people keep healthy and happy and live5 . Lots of people take part in sports and play games. But some people like to watch6 do sports. In order to watch the games, some people7 tickets or turn on their TVs at home. They don't go to bed until the games are8 . When their favourite player gets the first or the team that they like wins, they often9 very excited.

When the seasons change, sports will change. In seasons, people play different games. For example, swimming is fun in warm weather just like in summer, but skating or skiing (滑雪) is popular in10 .