文档介绍：Life on mars
9B Unit 1 Reading
Reading 2
Revision A: Answer the following questions about the life on Mars.
When will people move to the Mars?
Why will we leave our own Earth ?
How long does the spacecraft need to get to Mars at present ?
What might be the speed of the space shuttle by 2100 ?
What will the plants that can grow on Mars provide us with ?
By the year 2100.
Because Earth is ing more and more crowded and polluted.
It takes months.
At half the speed of light.
They will provide us with food and oxygen.
6. What will be a problem for the early settlers on Mars ?
7. How can people prevent this problem ?
8. What are the advantages for people on Mars ?
9. What can the students do in online schools ?
10. Where should the students connect puters ?
Gravity.
Humans will have to wear special boots to make themselves heavier.
a. More space b. More time c. No school.
They can study , do their homework and take exams.
They should connect puters to an work.
Revision B: Fill in the blanks with proper words.
Our own , earth , is ing more and more ________ and _________. Hopefully, we can build a better world on _______ by the year 2100.
First , _________ should be better . At present , it will take the spacecraft months to carry large _________ of people to Mars. By 2100, the __________could take only a few hours in space shuttles that travel at half the speed of light.
Gravity will be a problem for the early _________ on Mars. The gravity on Mars is only about______________ of the gravity on Earth . That would be __________ because people could _______ jump too high and ______ ________ into space . To _______ this , humans on Mars have to wear ________ boots to make themselves __________.
These boots will probably e very _____________ and there will be ________ designs for settlers to ________ from.
crowded
polluted
Mars
transport
numbers
journey
settlers
three-eighths
dangerous
easily
float
away
prevent
special
heavier
fashi