1. (2021八上·德惠月考) 阅读短文，把从A到E五个选择填入文中适当处，使短文内容完整。

Many people believe that, by the year 2100, we will live on Mars(火星). Here is what life could be like.

  First, transportation(交通) should be much better. In 2100, spaceships can travel very fast.

  Second, humans need food, water and air to live. Scientists should be able to find plants that can grow on Mars. These plants will give us food and air.

  We might easily jump too high and fly slowly away into space. So humans on Mars have to wear special shoes to make themselves heavier.

  Life on Mars will be better in many ways. 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.

  Every student can study, do his homework on the computer and take exams in online schools. Each student will also have his own online teacher called “e-teacher”.

  However, in some ways, life on Mars may not be better than that on the Earth today. Meals will probably be in the shape of pills and will not be as delicious as they are today. Also, space travel will make many people feel ill.

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.