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. 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.

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. 3._________________________ .It is possible to live a large building with many bedrooms. Then , robots will do most of the work, so we have more time for hobbies.

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. 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.

补全对话：（5分）

A： Hi, Wang Li! You look unhappy. What’s wrong?

B：1.__________________________________.

A： I don’t think that’s a good idea. We need to spend time with friends.

B： That’s right. 2.________________________________.

A：Really? But my father asks me to make friends with all of my classmates.

B. 3.___________________________

A. But my mother doesn’t let me play computer games for long.

B. 4.___________________________ We mustn’t spend too much time playing computer games.

A：5.______________________

B. You are right . I think we need to talk to our parents and make them understand us.

My schoolwork is better than ______.

A. she B. her C. Hers

Don’t believe ______ man with sunglasses. He’s a thief.

A. a B. the C.an

What do you expect ____ during your holiday?

A. to do B. do C. did D. doing

There ____ two meetings this afternoon.

A. is going to have B. is going to be C. will be

____ will you finish the work? In two days.

How many B. How often C. How soon

The problem is too difficult. ____ of us can work it out.

A. A few B. Little C. Few

Listen! Can you hear boy ____ in the next room?

A. sing B. to sing C. singing

—Look ! The apples are too big. Why don’t you _______first?

-–That sounds a good idea!

A. cut them up

B. cut it up

C. cut up them