A. There will probably be no school on Mars.
B. It might take us two or three days to get to Mars.
C. There is a problem for us to live on Mars.
D. Food will not be the same.
E. First, people will have more space.
Many people believe that, by the year 2100, we will live on the planet Mars(火星). Here is what life could be like.
First of all, transport should be much better. By 2100, spaceship can travel at half the speed of light.  【小题1】 
Secondly, humans need food, water and air to live. Scientists should be able to find plants that can grow on Mars. These plants will provide us with food and air.
 【小题2】  We could easily jump too high and fly slowly away into space. To prevent this, humans on Mars have to wear special shoes to make themselves heavier.
Life on Mars will be better in many ways.  【小题3】  It is possible to live in a large building with many bedrooms. Then, robot will do most of the work, so we have more time for hobbies.
 【小题4】 Every student can study, do their homework on the computer and take exams in online schools. Each student will also have their own online teacher called “e-teacher”.
However, in some ways, life on Mars may not be better than that on the earth today.  【小题5】Meals will probably be in the shape of pills(药片) and will not be as delicious as they are today. Also, space travel will make many people feel ill.

A new TV series in England，Away from it all，has surprised everyone by becoming a huge success with young people across the country．Its success is surprising because the series is about the relaxing lifestyles of people who live in the country．There is none of the action that we usually see on TV today．There are also no stressful moments，busy offices or crowded cities．Away from it all is set in the peaceful English countryside and tells simple stories about people’s kindness．  
The director of the TV series says that its success is a sign of teenagers suffering from stress．They say that watching Away from it all helps teenagers forget about the pressures(压力)of exams and homework，and the troubles that fill the world today．They also say that it’s a good sign of today’s young people switching to(转到)happier TV series as it shows they would like a happier and healthier world．
Although the series’success might have a good side，many teachers and parents are worried，however．They say that some of their students and children are becoming couch potatoes(终日泡在电视机前的人)and are using Away from it all as an excuse for not completing homework．Some children have even refused to learn for exams because they say that they can only achieve personal happiness by avoiding(避免)stressful situations completely．
And what do the experts(专家)say? Paula Ray，a doctor of education，says that TV can influence children’s lifestyles．But she says that if a child reacts strongly，it’s likely that there are other reasons for his change in behaviour．She says that there is nothing wrong with watching Away from it all but suggests that parents should make sure their children know TV is not the same as real life，
【小题1】The success of the new TV series is surprising because________．

Should we be afraid of sharks? Maybe not. New research into the reasons for shark attacks (攻击) suggests that sharks don’t like the way humans taste! In fact, most people who are attacked by the shark are still alive after receiving only one bite (咬). Why is this?
There are many opinions to explain why sharks sometimes attack people. One opinion is that sharks are just curious (好奇的). We know that sharks are the strongest animals in their environment, so they are not afraid of anything. Naturally, that means they are curious when they meet something unusual. Because they don’t have hands or feet., the only way they can find out an object is to bite it! It is thought that sharks sometimes bite humans for this reason, and then swim away.
Scientists also say that sharks would not waste energy trying to eat a human, as we have a lot of bones (骨头). It is hard for a shark to eat us because sharks don’t have hands, and they can’t pull the meat off our bones. Maybe that’s why they only bite us once. Unluckily, one bite from a large shark is serious enough to hurt people greatly!
Another opinion is that sharks attack humans by mistake. Some sharks may sometimes mistake humans for a seal. An example of this is when a shark attack attacks a surfer. A surfer lying on a surfboard looks like a seal when seen from below. Sharks like seals because they have thick fat.
Whatever the reason for shark attacks on humans, sharks should be afraid of us. Sadly, we kill almost 40 million of them each year.
【小题1】What happens to people attacked by sharks?