Some people believe that humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more crowded and polluted. It is hoped that people could start all over again and build a better world on Mars. Here is what life there could be like.

At present, our spacecraft are too slow to carry large numbers of passengers to Mars—it would take months. With the development of technology, by the year 2100, the journey might only take about 20 minutes in spacecraft that travel at the speed of light! However, the spacecraft would travel really fast, so the journey to Mars might be quite uncomfortable. Many people would feel ill.

Humans can’t live without water, air or food. So far, nobody knows whether there would be enough water or air on Mars for people. Moreover, scientists are not sure whether plants could grow on Mars. Food would most probably be in the form of pills (药片) and would not be so tasty.

Compared with life on the earth, life on Mars would be better in some ways. People would have more space. They might live in houses with huge comfortable rooms. Also, robots would do most of their work so that they could have more time to relax. There would probably be no schools on Mars. Every student would study at online schools with “e-teachers”.

Life on Mars would be interesting and challenging (有挑战性的). However, it may take hundreds of years to make it true. So the most important thing we need to do now is to protect our beautiful blue planet—the Earth!

【小题1】People would move to Mars because ________.

A．flying to Mars would be fun	B．plants could grow better there
C．the earth is crowded and polluted	D．they want to challenge themselves

【小题2】The underlined word “spacecraft” means ________.

A．plane

B．spaceships

C．space stations

D．hot-air balloons

【小题3】What would the flight to Mars be like by the year 2100?

A．Slow and boring.	B．Fast and enjoyable.
C．Slow but comfortable.	D．Fast but uncomfortable.

【小题4】What can we learn from the passage?

A．People would be busy with work on Mars.

B．There would be enough water and air on Mars for people.

C．Food on Mars would he more delicious than that on the earth.

D．The writer thinks living on Mars would be full of challenges.

【小题5】What’s the best title for the passage?

A．Life on Mars

B．Food on Mars

C．Schools on Mars

D．Environment on the Earth