Trees can be paper while this paper is rice straw. [ ] A．made of; made from B．made from; made of C．made out of; made up of D．made into; made from 题目和参考答案——青夏教育精英家教网—

Fire fighting is a serous matter, knowing what to do during a fire can save people’s lives. It is important to know the ways you can use and show them to everyone else in the family, such as stairways and emergency exits, but not elevators.

From the lower floors of building, escape through windows is possible. Learn the best way to get out from a window with the least chance of serious injury.

The second floor window is usually not very high from the ground. An average person, hanging by the fingertips will have a drop of about 6 feet to the ground. It is about twice the height of an average man. Of course, it is safer to jump a short way down than to stay in a burning building.

Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may have leaked into the room.

On the second or third floor, the best windows for escape are those which open onto a roof. From the roof a person can drop to the ground more safely. Dropping onto cement might end in injury. Bushes and trees can help you to have a soft landing.

Which of the following should not be used when trying to escape from a fire?

A. Windows B. Elevators C. Fire exits D. Stairways

How far from the ground is the second floor window?

A. about 12 feet B. about 6 feet

C. about the height of an average man D. nearly 10 feet

According to the passage, windows are ______ of escaping a fire?

A. the only way B. the best way

C. safer than any other ways D. one of the possible ways

The writer suggests that _______

A. breathing in smoke might be harmful B. smoke will enter the room through an open window

C. fresh air can’t reach the second floor window

D. to keep you head low will help you to escape a fire

If you are on the second or third floor when a fire breaks out, you’d better _____

A. drop directly onto the ground B. first drop onto a roof then onto the cement

C. drop from a roof window then onto bushes and trees

D. drop onto the cement rather than bushes and grass

C

Planting trees around poultry farms can improve air and water quality -- and relations with neighbors. Research has shown that just three rows of trees near poultry houses can reduce the release of dust and ammonia(氨). They can also reduce the strong smell of ammonia gas.

The trees take dust, ammonia and odors in their leaves. They also provide shade from the sun, so they reduce cooling costs in summer. And they act as a windbreak, so they reduce heating costs in winter. Trees can also improve water quality around farms by removing pollutions from soil and groundwater.

Several years ago, people were objecting to the odor of poultry farms on the Delmarva Peninsula in the eastern United States. Delmarva is where the states of Delaware, Maryland and Virginia come together. Two thousand farms there can each house an average of seventy-five thousand chickens.

Traditionally the farms used windows to provide fresh air in the chicken houses. Farmers rarely planted trees or tall crops around the buildings, so there would be no barrier to the airflow. But then farms began to use new ventilation systems. Instead of windows, the new systems used tunnel fans to circulate air. The fans directed airflow from the poultry houses toward the homes of neighbors.

Researchers began dealing with the problem in two thousand. They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half. And they found that smells were reduced by eighteen percent.

Farmers may think trees will take too long to grow and be effective. But some trees can grow quickly. At least one-third of the Delmarva farms have planted trees, technically known as vegetative environmental buffers. The idea offers a way to cut pollution, save money and energy, and make the neighbors happy.

49. The second paragraph mainly tells us ______.

A. planting trees as much as possible

B. the advantages of trees

C. how to reduce heating costs

D. why trees are received

50. The word “odor” in paragraph 3 means ______.

A. plant B. smell C. height D. water

51. The farms on the Delmarva Peninsula used to use ______ in chicken houses to provide fresh air.

A. trees B. tunnel fans C. windows D. poles

52. It can be learned from the last two paragraphs that ______.

A. three rows of trees are really good to the environment

B. researches began to realize the problem in 2000

C. most farmers show interest in planting trees

D. the trees growing quickly can be cut off in a few years

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.

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

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.

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

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

All Eskimos live most of their lives close to sea or fresh water. They may follow game inland for several hundred miles, but they always return to the shores of rivers, lakes, or seas. Eskimo land has a bare look. Large rocks, pebbles, and sand cover much of the surface. Plants called lichen (地衣) grow on the rocks, and where there is enough soil, grass, flowers, and even small bushes manage to live. No trees can grow on Eskimo land, so geographers sometimes call it the Arctic plains. There are some animals in Eskimo land, such as rabbits, which eat the plants. Other animals, like the white fox and the gray wolf, eat the rabbits. The Eskimo is a meat－eater, too, and may even eat a wolf when food is scarce.

The Eskimo year has two main parts：A long, cold winter and a short, cool summer. Spring and fall are almost too short to be noticed. Summer is the best time, as food is usually plentiful. But it is also the time when Eskimos are very busy. Winter is never far away, and the men must bring home extra meat for the women to prepare and store, for seldom can enough animals be killed in winter to feed a family.

The Far North is sometimes called the land of the midnight sun. This is true in the middle of summer, for between April 21st and August 21st the sun never sets in Northern Greenland. But in midwinter the Far North is a land with no sunshine at all. Around October 21st the Eskimos of Northern Greenland see the sun set directly south of them, and they don't see it again until February 22nd. All places on earth get about the same amount of daylight during a year. As a result, if summer is lighter, winter has to be darker.

Winter nights in the Far North are seldom pitch－black. As in the rest of the world, the stars and moon provide a little light. The northern lights also help the Eskimo to see. And with the ground covered with snow, even a little light is reflected back to the Eskimo's eyes.

6. Which of the following statements is NOT true?

A. Eskimos do not usually eat wolves.

B. Eskimos like to chase one another.

C. Eskimos depend heavily on water.

D. Eskimos are meat－eaters.

7. In the Eskimo year, ________.

A. there is no spring and fall

B. winter is cold and summer is hot

C. summer is a time for growing food

D. winter comes early and goes late

8. What's the meaning of the underlined word “pitch－black” in Paragraph 4?

A. Dark with a little light.

B. A little dark.

C. Not dark at all.

D. Extremely dark.

9. From the passage, we can infer all of the following EXCEPT that ________.

A. Eskimos are more likely to eat wolves in summer

B. Eskimo women are responsible for housework

C. meat is the main source of food for the Eskimo

D. hunting is an important part of Eskimo life

10. Why is summer lighter in the Far North?

A. Because the Far North is far away from the sun.

B. Because the sun is not seen for five months of the year.

C. Because the sun never sets in midsummer.

D. Because people see the sun set directly south of them.

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.

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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