Trees of this kind are so that they can be seen everywhere. A．much B．common C．usual D．few 题目和参考答案——青夏教育精英家教网—

题目内容

Trees of this kind are so ________ that they can be seen everywhere.

A．much

B．common

C．usual

D．few

答案：B
提示：

这种很普通随处可见

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　　Do you know something about tree rings?Do you know they can tell us what the weather was like, sometimes even hundreds of years ago?

　　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 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．

(1)

________ in good climate．
[　　]
A．	Tree rings grow far from each other
B．	Tree rings become thinner
C．	Trees don’t need sunshine or rainfall
D．	People can cut down most of the trees

(2)

The scientists are interested in studying tree rings because tree rings can tell ________．
[　　]
A．	whether a tree was strong or not
B．	whether people took good care of the trees or not
C．	whether the climate was good or not
D．	how old the trees were

(3)

If you want to find out the weather of twenty years ago,you should study ________．
[　　]
A．	the twentieth ring
B．	the tenth ring
C．	the nineteenth ring
D．	the twenty first ring

(4)

Why did people usually live in places with lots of trees?
[　　]
A．	Trees could tell the change of the weather．
B．	Trees brought lots of sunshine and rain．
C．	Trees could make weather not too hot or too cold．
D．	Trees could be used for burning and for building house．

(5)

The people had to leave the place in New Mexico because ________．
[　　]
A．	bad weather stopped the growth of trees
B．	they no longer had water and the land became sand
C．	they didn’t have enough trees for burning
D．	there was too much rain there

A little boy almost thought of himself as the most unfortunate child in the world because a disease made his leg lame．He 36 played with his classmates．When the teacher asked him to answer questions，he always 37 his head without a word．
One 38 the boy’father asked for some saplings(树苗)from the neighbor．He wanted the 39 t0．plant a sapling each person in front of the house。The father said，“Wh6se sapling grows best， 1 will buy him or her a favorite 40．" Seeing his brothers and sisters watering the trees，however，the boy had an idea．tie，hoped that the tree he planted would 41 soon．S0． after watering it once or twice，he never 42 it．
A few days later，when the little boy went、to see his tree again，he was 43 to find that it didn’t fade but grew some fresh leaves． 44 the trees of his brothers and sisters，his tree was even greener．His father kept his 45， bought the little boy his favorite gift and said that from the tree he planted，he would become an outstanding 46 when he grew up．
Since then，the little boy slowly became 47 .One night，he lay on the bed but eouldn’t sleep Then he got up and came to the 48.T0 his surprise，his 49 was splashing something onto his tree． 50，he understood——his father had been 51 fertilizing his small tree!
He returned to his room，52 running down 53 passed．The little boy didn’t become a botanist，but he was elected President of the United States．His name was Franklin Rooseveh．
Love is the 54 nourishment(营养)of life．55 it is just a drop of clear water，it can still help the tree of life thrive(茁壮成长)．

We all enjoy the colors of autumn leaves. Did you ever wonder how and why a fall leaf changes color? Where do the yellows and oranges come from? To answer those questions, we first have to understand what leaves are and what they do.
Leaves are nature's food factories. Plants take water from the ground through their roots. They take a gas called carbon dioxide from the air. Plants use sunlight to turn water and carbon dioxide into glucose, which is a kind of sugar. Plants use glucose as food for energy and as a building block for growing. The way plants turn water and carbon dioxide into sugar is called photosynthesis, which means " putting together with light. " A chemical called chlorophyll helps make photosynthesis happen. Chlorophyll is what gives plants their green color.
As summer ends and autumn comes, the days get shorter and shorter. This is how the trees "know" to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. The trees will rest, and live off the food they stored during summer. They begin to shut down their food-making factories. The green chlorophyll disappears from the leaves. As the bright green fades away, we begin to see yellow and orange colors. Small a-mounts of these colors have been in the leaves all along. Covered up by the green chlorophyll, we just can't see them in summer.
The bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color. The brown color of trees like oaks is made from wastes left in the leaves.
It is the combination of all these things that make the beautiful colors we enjoy in the fall.
【小题1】The writer asked two questions in the beginning in order to .

A．persuade readers to believe something

B．introduce the topic of the passage

C．get the readers excited

D．offer something to think over

【小题2】 Which of the following is True according to the passage?

A．Trees don't change colours with seasons.

B．Trees can still perform photosynthesis well in winter.

C．Trees have colours like yellow and orange even in summer.

D．Trees don't need food in winter.

【小题3】Photosynthesis is a way that ___________________________.

A．plants change water and carbon dioxide into sugar

B．plants turn water and carbon dioxide into sugar with the help of sunlight

C．plants use glucose as food for energy and growing

D．chlorophyll is a great help

【小题4】 Which is the best title for this passage?

A．Colorful trees in autumn	B．Mysteries of tree colors
C．Do you enjoy tree colors?	D．Wonderful colors in autumn

London: What could possibly he wrong with planting trees? The benefits are obvious: they firm the soil, absorb extra water and take carbon dioxide out of the atmosphere.
However, it now turns out that planting trees could add to global warming. Tree roots do a great job of keeping soil firmly on the ground and out of the wind's power. The problem is that some of those dust clouds play an important part in taking in carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting program there is successful and the dust supply reduced, the final result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work shows clearly the complexity of the system and the importance of not working uselessly with it without understanding the results. For this reason the need is to focus on cutting carbon dioxide giving off rather than dealing with the land surface aimlessly.
An American scientist, Robert Jackson, has shown that when native grassland areas are occupied by trees, carbon is lost from the soil. "We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees. " said Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed by the loss of carbon from the soil below ground.
Countries that plan to combat global warming by planting trees may have to think again. Solutions to environmental problems are often more complex than they first appear, and understanding the Earth's climate is a very great challenge.
64. People usually hold the opinion that _______.
A. huge dust storms can destroy carbon dioxide
B. huge dust storms can destroy the oceans on the earth
C. planting trees could reduce global warming
D. planting trees is the only way to control huge dust storms
65. Andy Ridgwell, the environmental scientist, believes that _______.
A. environmental problems are more complex than expected
B. trees shouldn't have been planted in dry places
C. dust plays a more important part than trees
D. carbon dioxide is harmful to everything
66. Robert Jackson's experiment proves that _______.
A. carbon can turn grass into dust
B. trees hold more carbon than grass
C. less carbon can make trees grow faster
D. grassland areas should be covered by forests
67. The underlined word "combat" in the last paragraph means _______.
A. learn about B. give up C. live with D. fight against

Leaves are nature's food factories. Plants take water from the ground through their roots. They take a gas called carbon dioxide from the air. Plants use sunlight to turn water and carbon dioxide into glucose, which is a kind of sugar. Plants use glucose as food for energy and as a building block for growing. The way plants turn water and carbon dioxide into sugar is called photosynthesis, which means " putting together with light. " A chemical called chlorophyll helps make photosynthesis happen. Chlorophyll is what gives plants their green color.

As summer ends and autumn comes, the days get shorter and shorter. This is how the trees "know" to begin getting ready for winter.

During winter, there is not enough light or water for photosynthesis. The trees will rest, and live off the food they stored during summer. They begin to shut down their food-making factories. The green chlorophyll disappears from the leaves. As the bright green fades away, we begin to see yellow and orange colors. Small a-mounts of these colors have been in the leaves all along. Covered up by the green chlorophyll, we just can't see them in summer.

The bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color. The brown color of trees like oaks is made from wastes left in the leaves.

It is the combination of all these things that make the beautiful colors we enjoy in the fall.

1.The writer asked two questions in the beginning in order to .

A. persuade readers to believe something

B. introduce the topic of the passage

C. get the readers excited

D. offer something to think over

2. Which of the following is True according to the passage?

A. Trees don't change colours with seasons.

B. Trees can still perform photosynthesis well in winter.

C. Trees have colours like yellow and orange even in summer.

D. Trees don't need food in winter.

3.Photosynthesis is a way that ___________________________.

A. plants change water and carbon dioxide into sugar

B. plants turn water and carbon dioxide into sugar with the help of sunlight

C. plants use glucose as food for energy and growing

D. chlorophyll is a great help

4. Which is the best title for this passage?

A. Colorful trees in autumn B. Mysteries of tree colors

C. Do you enjoy tree colors? D. Wonderful colors in autumn

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