题目内容
when he discovered something strange. Some of his wheat was lying on the ground. The flattened wheat
formed (形成) a circle about six meters across. Around this circle were four smaller circles of flattened wheat.
Three years later a farmer who lived nearby discovered almost the same circles in one of his fields. These
circles were larger-nearly 15 meters across. That same year, another English farmer discovered three circles
of flattened wheat on his land-one large circle between two small circles. During the following years, farmers
in England found circles in their fields more and more often.
The circles are called "crop circles" because they usually appear in fields of wheat or corn. The wheat in
the circles lies on the ground but is never broken; it keeps on growing, and the farmers can later harvest it.
Farmers always discover the crop circles in the morning, so the circles probably form at night. They appear
only in the months from May to September. What causes the crop circles?
At first, people thought that some kids were making them as a joke, or that farmers were making them to
attract tourists.(In fact, in 1991, two men said they made the circles themselves, but many scientists don't
believe them.) People tried to copy them: They tried to make circles exactly like the ones the farmers had
found. They couldn't do it. They couldn't enter a field of wheat without leaving tracks, and they couldn't
flatten the wheat without breaking it.
Several times people reported seeing stranger objects near the fields where crop circles later appeared.
Many people believe that these crop circles are the messages sent by living things from outer space (外层空间) or the marks left by their spaceships.
Scientists who have studied the crop circles try to find out what causes them. In the summer of 1990
some scientists spent three weeks in the part of England where many circles have appeared. They had all the
latest high-tech equipment (最新高科技设备). The equipment-worth 1.8 million dollars-got nothing. But one
night, as the scientists were watching a field, crop circles formed in the field behind them, which were quite
different from the others. The scientists had neither seen nor heard anything.
When Steven discovered the crop circles on his land in 1978, he said, "It was just like something that had
landed in the field from the air and gone back up again. I don't know what to make of these things."
Crop circles have appeared in England, Japan, the United States and Russia. Experts from all over the
world have studied them, and they say what Steven said: They don't know what to make of these things.
B. lying wheat
C. harvested wheat
D. growing wheat
B. that cannot be solved but found all around the world
C. that cannot be made clear or understood
D. that is discovered and copied by the farmers
阅读理解
High in the mountains, and deep in the forest, lives a lake with many plants and animals in and around her. The plants and animals have enough food and clean water to keep them healthy. The wind carries pure air, and the rain comes down clear and clean.
But recently, Lucy Lake and her friends haven’t been feeling very well. All the plants and animals get together to talk about the problem. “Why are we sick?” “What can we do?” ask all of them. No one has any answers.
Just then two hikers appear. The animals tell them about their problems. “Can you help us?” they ask. “Yes,” one hiker says. “I think it’s because of acid rain.”
“Acid rain comes from chemicals(化学物质) in the air. The pollution comes from factories, cars and trucks.”
“So, although I don’t want to, I help the pollution travel through the air!” says the wind. “And I carry it to the land!” cries the rain.
“If you can help us think of some solutions(解决方法), we will send a message to tell people how to clean up our environment,” one hiker says.
With the help of the plants and animals, the two hikers make a list of ideas for saving Lucy Lake and her friends.
Time passes, and the forest and lake begin to feel a little better.
The next time the hikers climb up the mountains to Lucy Lake, they smile at what they find. “We’re glad things have started to change,” one hiker says. “And we’re glad you helped us make a difference,” says the other.
1.The underlined word “pure” can be replaced by “____”.
A.polluted |
B.clean |
C.cold |
D.cool |
2.The two hikers are most probably ____.
A.scientists |
B.teachers |
C.doctors |
D.reporters |
3.____ have (has) nothing to do with the cause of acid rain.
A.The rain |
B.Human beings |
C.The wind |
D.The plants and animals |
4.The underlined word “you” refers to (指) ____.
A.Lucy Lake |
B.the plants and animals |
C.one of the two hikers |
D.the wind and the rain |
5.Which of the following is NOT true?
A.Acid rain is very harmful only to plants and animals. |
B.Human activities are the main cause of acid rain. |
C.Acid rain can make the living things in the environment get sick. |
D.We should clean up our environment to protect us against acid rain. |