题目内容
3.p________ flow in large amounts
3. pour
1. Products should be developed the demand.
2. the facts we have found,he can't be guilty.
3.At present, good secretaries are always .
4.Tom come to visit us this weekend.
5.These two events each other.
Many scientists are now exploring the idea of going to live on Mars. Some other scientists from the NASA Ames Research Centre(美国航空航天局艾姆斯研究中心) have already started the creation of a "Mars town" and many others are in fact already experimenting with it. Of course, these experiments are done on Earth itself but this " Mars town" has an environment practically like that of Mars.
The astronauts working in these towns wear their spacesuits and also do everything they would really have to carry out if they ever go to Mars in the future.
But Mars would be like Earth,a temporary place for humans. When the Sun starts swallowing up the planets,Mars will disappear only hours after Earth. So Mars only seems to be the ideal place to spread the human beings. It is also a good location to send humans if ever there is a disaster on Earth. By saying disaster,I mean asteroids(小行星) hitting and things like that.
If we humans do not want to disappear when Earth or Mars gets swal?lowed up,we will have to go and live beyond the solar system. But are there any planets outside our solar system prepared to support life? Astronomers' answer is:
"If Earth can support life,why can't other planets do the same too? As?tronomers have already discovered a Jupiter(木星) -like planet orbiting a Sun?like star,so why not an Earth-like planet orbiting a Sun-like star?"
To achieve this goal though，many other problems have to be taken into con?sideration. How do we transform a dusty planet like Mars into one more or less like our Earth? How should we go on? There is still a long way to go.
6.The "Mars town" mentioned in the passage is________ .
A.a research base on Mars
B.an experimental lab built on Earth
C.a strange place on Mars
D.a town existing in scientists' imagination
7.We can know from the passage that astronomers probably think________ .
A.it is impossible to transport humans to other planets
B.there may be an Earth-like planet outside the solar system
C.humans will move to the new-found Jupiter-like planet
D.there's no need for humans to move beyond the solar system
8.Why would Mars only be a temporary(临时) place for humans?
A.The conditions there would be too hard for the human beings.
B.There would be more disasters like asteroids hitting.
C.It would disappear when Earth disappeared.
D.It would be too hot to live on.
9.The underlined word "orbiting" in the fifth paragraph is closest in meaning to ________" ”.
A. moving around B. getting close to
C. passing by quickly D. going through
10. Which of the following would be the best title for this passage?
A. Mars town B. Living on Mars
C. The future of Earth D. Where to live in the future
10. A red light is a (sign) of danger,which is even known to a five- year-old child.
5.She doesn't e much money,but she enjoys the work.
4.They required that the books (return) to the school library right away.
8.a________ a written or spoken description of sth that has happened
2.最新的研究表明这个药对有心脏病的人可能有益。
Recent research suggests that the drug________________________ to people with heart disease.
8.She found it difficult to e________ a new routine after retirement.
