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.

Many places in the world need more fresh water. Every country is trying to find ways to turn salt water into fresh. Why aren’t there many factories like the Symi factory?
In some places the sun is not hot enough. Or it does not shine every day.
In such places other ways of heating sea water can be used. These ways cost more money, but they work faster than the sun. By boiling sea water with high heat a lot of fresh water can be made quickly.
But heating is not the only way to get fresh water from salt water. Other ways are tried.
One way is freezing. The fresh part of salt water freezes first. To get fresh water, the bits of ice are taken out.
Which way is the best? The one that gives the most water for the least money. It may be a different way for each place.
Symi’s way seems very good for small, hot places. It does not make much water at a time. But the factory is easy to build and costs little.
That is why people in many dry places talk about Symi. 
【小题1】From the passage we know that fresh water _____________.

A Russian, a Cuban, an American businessman and an American lawyer were on a train traveling across England. The Russian took out a large bottle of vodka, gave each of the men a drink and then threw the rest half bottle of vodka out of the window. “Why did you do that?” asked the American businessman. “There’s too much vodka in my country,” said the Russian, “And really we have more than we will ever use.” A little later, the Cuban passed around fine Havana Cigars. Then he threw his out of the window. “I thought Cuba is not a rich country,” the businessman said. “But you threw that very good cigars out of the window!” “Cigars,” the Cuban answered, “are the cheapest in my country. We have more of them than we know what to do with.” The American businessman sat quietly for a moment. Then he got up, caught the lawyer by the arm and threw him of the window.
【小题1】The people in the story are from ______ countries.