At the moment，it may be difficult to imagine，but many people believe that，by the year 2100，we will live on the planet(行星) Mars.Our own planet，Earth，is becoming more and more crowded and polluted.We should build a better world on Mars.
First of all，transport should be better than they are today.Now it is difficult for spacecraft(宇宙飞船) to carry too large number of people to Mars梚t takes months.By 2100，travel to Mars will take a very short time in space shuttles that travel at half the speed(速度) of light.
Humans need water，air and food to survive.Scientists should be able to develop the plants that can grow on Mars.These plants can provide the air and food that we need.However，the scientists are not sure whether these plants can provide water.
Gravity(重力) will be the problem for the early settlers on Mars.The gravity on Mars will be about only three-eighth of the gravity on Earth.It is very dangerous for us because we can easily jump too high and float(漂浮) away into space.To prevent this，we have to wear special boots to make ourselves heavier.These boots will probably very popular and there will be many different designs for settlers to choose from.
Life on Mars will be better than life on Earth in many ways.We will have more space.Living in a dome with 10 bedrooms is highly possible.Many people thought that robots will do most of our work and we will have more time for our
hobbies.There will be no schools on Mars.Students will have a computer at home connecting to the inter-planet computer network.They can study，do homework and take exams in online schools.
However，in some ways，life on Mars may be worse than life on Earth.For example，food will be not the same as they are today，it may be in the form of pills(药片).
(1)
Why do we need to move to another planet?
A. Because the scientists are now quite interested in living on another planet.
B.Because the students are having too much homework on Earth.
C.Because there are a lot of aliens(外星人) on Mars.
D.Because our own planet Earth is becoming more and more polluted and crowded.
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(2)
What will be the problem for the early settlers on Mars?
A.Food and water. B.Schools.
C.Gravity. D.both A and C
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(3)
What can plants do on Mars?
A.Plants can provide water and food for settlers.
B.Plants can provide everything we need on Mars.
C.Plants can provide us oxygen(氧气) and food that we need on Mars.
D.Plants can give us a beautiful environment to live on Mars.
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(4)
How do students get education on Mars?
A.Students don't need to go to school or get education on Mars.
B.Students can have lessons and take exams online.
C.Students can go to a normal school like that on Earth.
D.We don't know.
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(5)
What do you think it is the best tide for the passage?
You will have a lot of reading to do in this grade this year．You can do more of it in less time if you learn to read rapidly．
Perhaps you have been told about some habits (习惯) which keep a person from reading fast and have been strongly asked to break those habits which you might have．
Do you still have any of these bad habits?Check yourself by answering“yes”or“no”to these questions．
(1) Do you move your lips (嘴唇) when reading silently?
(2) Do you point to words with your finger as you read?
(3)Do you move your head from side to side as you read?
(4)Do you read one word at a time?
If you answer“yes”to any of these questions,start at once to break the habit．If you move your tips，hold your fingers over them，or hold a piece of paper be-tween your lips while you are reading．Then if your lips move，your will know it and can stop them．
If you point to words，hold the two sides of your book，one side with your left hand，the other side with your right hand．Then you won't have a free finger to use in pointing while reading．If you move your head，place your chin (下巴) in one hand and hold your head still (静止不动的)．
If you read no more than one or two or three words at a time，you need to work very hard in learning to take in (吸收) more words at each glance (一瞥) as your eyes travel across the lines of words．
Even if you do rather fast now，you can learn to read even faster．As you probably have been told，the secret of fast reading is to take in whole groups of words as each glance．Read in through groups and force (迫使) your eyes along the lines of words as fast as you can to make them go．Anyone who practices doing these things will he able to read faster．
(1)
You may hold your fingers over your lips while reading so as ______．
A．to tell others to be silent
B．to feel whether your lips move or not
C．to hold a piece of paper between them
D．to keep yourself from talking to others
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(2)
When you read，______．
A．don't keep your head still
B．don't hold your books with your hands
C．don't stand up near a desk
D．don't use your finger to point to words
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(3)
If you learn to read fast，______．
A．you can read more in less time
B．you can write faster
C．you can understand better
D．you can read less in more time
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(4)
You must _______ those habits that we are talking about in this reading．
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