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三、短文填空
阅读下面的短文，在空白处填入一个适当的单词或括号内单词的正确形式
In the sea there are many islands. In its warm waters there are some little ones. We call them coral islands. 1.
If you look into this lake, you will see beautiful coral. You may think they are flowers. If you look at a piece of coral, you will see many little holes in it. A very small sea animal 4.
They began to build under the water. Year after year, the coral grew 5.
So you see these islands were built little by little. The workers were very small. Don't they teach 10.
阅读下面的短文，在空白处填入一个适当的单词或括号内单词的正确形式
In the sea there are many islands. In its warm waters there are some little ones. We call them coral islands. 1.
A
coral island looks very nice. It looks 2. like
a ring of land with trees, grass, and flowers on it. One part 3. of
the ring is open to the water.If you look into this lake, you will see beautiful coral. You may think they are flowers. If you look at a piece of coral, you will see many little holes in it. A very small sea animal 4.
lives
(live) in each of these holes. These sea animals make the coral.They began to build under the water. Year after year, the coral grew 5.
higher
(high) and higher. At last it grew out of the water. Then the sea brought it to small trees and 6. something
(anything) else. After some years, these things 7. changed
(change) into earth. Sometimes the wind brought seeds (种子) to this earth. Sometimes birds flew over it and brought seeds to the island. The little seeds grew. In a few years there were 8. plants
(plant) all over the island. In a few more years there were trees 9. growing
(grow) there.So you see these islands were built little by little. The workers were very small. Don't they teach 10.
us
(we) a lesson? Can you think what the lesson is?
答案：
1. A 2. like 3. of 4. lives 5. higher
6. something 7. changed 8. plants
9. growing 10. us
6. something 7. changed 8. plants
9. growing 10. us
四、阅读表达
Do you know something about tree rings (年轮)? Do you know they can tell us what the weather was like, sometimes even hundreds of years ago? Trees can keep a record of Earth's climate for a very long time. In fact, trees can live for hundreds and sometimes even thousands of years.
A tree will grow well in a climate with lots of sunshine and rainfall. And little sunshine or rainfall will limit (限制) the growth of a tree. We can see the change of climate by studying the tree rings. For example, to find out the weather of ten years ago, count the rings of a tree from the outside to the inside. If the tenth ring is far from the eleventh ring, then we're sure that it was sunny and rainy most of that year. If it is near to the eleventh ring, then the climate that year was bad.
Tree rings are important not only for studying the history of weather but also for studying the history of man. Many centuries ago there lived a lot of people at a place in New Mexico. But now you can find only sand there — no trees and no people. What happened?
A scientist studied the rings of dead trees there. He found that the people had to leave because they had cut down all the trees to make fires and buildings. As all the trees had gone, the people there had to move.
阅读短文，完成下列各题。
1. What is the article about?
It's about
2. In what kind of climate will the trees grow well?
A tree will grow well in a ________.
3. If we see the tenth ring is near to the eleventh ring, what are we sure?
We are sure the climate that year was
4. Can you find any people at a place in New Mexico now?
________.
5. Why did people have to leave the place in New Mexico?
Because they had cut down all the trees to
Do you know something about tree rings (年轮)? Do you know they can tell us what the weather was like, sometimes even hundreds of years ago? Trees can keep a record of Earth's climate for a very long time. In fact, trees can live for hundreds and sometimes even thousands of years.
A tree will grow well in a climate with lots of sunshine and rainfall. And little sunshine or rainfall will limit (限制) the growth of a tree. We can see the change of climate by studying the tree rings. For example, to find out the weather of ten years ago, count the rings of a tree from the outside to the inside. If the tenth ring is far from the eleventh ring, then we're sure that it was sunny and rainy most of that year. If it is near to the eleventh ring, then the climate that year was bad.
Tree rings are important not only for studying the history of weather but also for studying the history of man. Many centuries ago there lived a lot of people at a place in New Mexico. But now you can find only sand there — no trees and no people. What happened?
A scientist studied the rings of dead trees there. He found that the people had to leave because they had cut down all the trees to make fires and buildings. As all the trees had gone, the people there had to move.
阅读短文，完成下列各题。
1. What is the article about?
It's about
tree rings
.2. In what kind of climate will the trees grow well?
A tree will grow well in a ________.
3. If we see the tenth ring is near to the eleventh ring, what are we sure?
We are sure the climate that year was
bad
.4. Can you find any people at a place in New Mexico now?
________.
5. Why did people have to leave the place in New Mexico?
Because they had cut down all the trees to
make fires and buildings
.
答案：
1. tree rings
2. climate with lots of sunshine and rainfall
3. bad
4. No, we can’t.
5. make fires and buildings
2. climate with lots of sunshine and rainfall
3. bad
4. No, we can’t.
5. make fires and buildings
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