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四、阅读理解
Mars is not，it seems，the dry cold planet we once believed it to be. Astronauts who are expected to go there in the next ten years may find plenty of water to make them feel less thirsty，according to the recent research. If there is water，it will be much more possible to find life on Mars.
This is the view of 40 geologists（地质学家）who have been analyzing（分析）thousands of pictures and other scientific information which were sent back by robot explorers in the 1960s and 1970s.
At first，scientists thought the red planet was as lifeless as the Moon with dust storms blowing over the large sandy deserts（沙漠）. Also，they could not find any living things from those pictures. But now the pictures are very different with mountains and valleys（峡谷）cut by glaciers（冰川）and rivers running deep underground，which provides the possibility of life.
In a report on the analysis of the pictures of Mars，Dr Michael Car of the US says，“I believe there is lots of water on Mars.” Water will be in the form of ice. Then it could save explorers from having to take water with them. Explorers could try to use the water there.
The report says that Mars probably had a warmer climate in ages past，because of its axis（轴线）having been more tilted（倾斜）towards the Sun.
No convincing（有说服力的）signs of plants or animals have been found by instruments landed on Mars although only nearby area of landing instruments could be examined. But we could still imagine in the future，human beings can survive there.
（ ）1. It was once believed that ________.
A. Mars was a dry cold planet B. Mars was a wet cold planet
C. Mars was an icy cold planet D. Mars was full of water
（ ）2. The pictures of Mars show that ________.
A. Mars is the same as the Moon
B. Mars has a warmer climate now
C. there are glaciers and underground rivers on Mars
D. there are signs of plants and animals on Mars
（ ）3. Now we can infer that ________.
A. the weather on Mars is hot B. there are dust storms on Mars
C. Mars has large sandy deserts D. Mars may be colder than before
（ ）4. What is the best title for the passage?
A. A Story of Mars. B. Can We Find Life on Mars?
C. How to Live on Mars. D. Differences Between Mars and the Earth.
Mars is not，it seems，the dry cold planet we once believed it to be. Astronauts who are expected to go there in the next ten years may find plenty of water to make them feel less thirsty，according to the recent research. If there is water，it will be much more possible to find life on Mars.
This is the view of 40 geologists（地质学家）who have been analyzing（分析）thousands of pictures and other scientific information which were sent back by robot explorers in the 1960s and 1970s.
At first，scientists thought the red planet was as lifeless as the Moon with dust storms blowing over the large sandy deserts（沙漠）. Also，they could not find any living things from those pictures. But now the pictures are very different with mountains and valleys（峡谷）cut by glaciers（冰川）and rivers running deep underground，which provides the possibility of life.
In a report on the analysis of the pictures of Mars，Dr Michael Car of the US says，“I believe there is lots of water on Mars.” Water will be in the form of ice. Then it could save explorers from having to take water with them. Explorers could try to use the water there.
The report says that Mars probably had a warmer climate in ages past，because of its axis（轴线）having been more tilted（倾斜）towards the Sun.
No convincing（有说服力的）signs of plants or animals have been found by instruments landed on Mars although only nearby area of landing instruments could be examined. But we could still imagine in the future，human beings can survive there.
（ ）1. It was once believed that ________.
A. Mars was a dry cold planet B. Mars was a wet cold planet
C. Mars was an icy cold planet D. Mars was full of water
（ ）2. The pictures of Mars show that ________.
A. Mars is the same as the Moon
B. Mars has a warmer climate now
C. there are glaciers and underground rivers on Mars
D. there are signs of plants and animals on Mars
（ ）3. Now we can infer that ________.
A. the weather on Mars is hot B. there are dust storms on Mars
C. Mars has large sandy deserts D. Mars may be colder than before
（ ）4. What is the best title for the passage?
A. A Story of Mars. B. Can We Find Life on Mars?
C. How to Live on Mars. D. Differences Between Mars and the Earth.
答案
1-4 ACDB
