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, spaceships can travel at half the speed of light. It might take us two or three days to get to Mars.
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.
There is a problem for us to live on Mars. 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. First,people will have more space.It is possible to live in a large building with many bedrooms.Then, robots will do most of the work,so we have more time for hobbies.
Maybe we won’t have schools on Mars.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 the life on the earth today. Food will not be the same. 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.
56.People can live without________.
A.food       B.water      C.air      D.computer  
57.Which is NOT true according to the passage?  
A.Many people think we’ll live on Mars by 2100.                  
B.Light can travel faster than the spaceships.       
C.Students may have their own e-teachers on Mars.     
D.The meals on Mars will be as delicious as they are on the earth.  
 58.People on Mars have to wear special shoes because_________.  
A.the shoes are cool                   B.they want to jump high  
C.the shoes can make them heavier       D.people have more space   
59.Why should scientists find plants which can grow on Mars?  
A.Because the plants can make Mars more beautiful.              
B.Because the plants can give us food and air.       
C.Because the scientists need do some experiments.
D.Because they find it interesting to do that.   
60.The purpose of this article is_________.  
A.to tell us what the life could be like on Mars in the future           
B.to tell us there are no schools on Mars  
C.to explain why we will live on the Mars                
D.to show the writer’s interest in the life on Mars

56---60  D D C B A