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The Smallest Life Around Us
Tiny plants and animals live all around us．We cannot see them because they are so small，but they are everywhere. They live in the soil，in the air，and in rivers and oceans．They grow on mountains and in caves．Some live in the ice at the north and south poles; some live where it is very hot．They are found throughout cities and in the country. They grow on other plants and animals．Some are even living on you，on your skin，hair，and inside your body，in your mouth，nose，and all through your body．
These tiny plants and animals are called microbes．The word microbe is made from two other words：micro，meaning small，and bios，meaning life．So，microbe means small life．
Microbes have been on earth for a very long time．They may have been the first forms of life to be alive．Today there are more microbes in the world than all other living things．
People did not know microbes had existed（存在） long．They were too small for them to see．But people did see many changes in their world﹣important changes．And they did not know what caused them．They saw food that they kept too long change color and begin to smell bad．They saw cuts and wounds grow red and painful and become worse. They saw old plants and leaves and trees crumble apart on the forest floor and disappear into the soil．Such changes were a natural part of the world，but people did not understand them．They did not know these changes were evidence(证据) of tiny plants and animals growing all around them.
1.Why couldn't people see microbes？
A. Because they are too small．
B. Because they live inside our body．
C. Because they live far from humans．
D. Because they may have been the first forms of life to be alive．
2.The underlined phrase" crumble apart" in the last paragraph means" "．
A. grow taller B. change into soil
C. break into tiny pieces D. become colorful and energetic
3.Choose the answer that completes the web below．
A. Microbes are very small B. Microbes are all around us
C. People can't see microbes D. Food begins to smell bad
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The Smallest Life Around Us
Tiny plants and animals live all around us．We cannot see them because they are so small，but they are everywhere. They live in the soil，in the air，and in rivers and oceans．They grow on mountains and in caves．Some live in the ice at the north and south poles; some live where it is very hot．They are found throughout cities and in the country. They grow on other plants and animals．Some are even living on you，on your skin，hair，and inside your body，in your mouth，nose，and all through your body．
These tiny plants and animals are called microbes．The word microbe is made from two other words：micro，meaning small，and bios，meaning life．So，microbe means small life．
Microbes have been on earth for a very long time．They may have been the first forms of life to be alive．Today there are more microbes in the world than all other living things．
People did not know microbes had existed（存在） long．They were too small for them to see．But people did see many changes in their world﹣important changes．And they did not know what caused them．They saw food that they kept too long change color and begin to smell bad．They saw cuts and wounds grow red and painful and become worse. They saw old plants and leaves and trees crumble apart on the forest floor and disappear into the soil．Such changes were a natural part of the world，but people did not understand them．They did not know these changes were evidence(证据) of tiny plants and animals growing all around them.
1.Why couldn't people see microbes？
A. Because they are too small．
B. Because they live inside our body．
C. Because they live far from humans．
D. Because they may have been the first forms of life to be alive．
2.The underlined phrase" crumble apart" in the last paragraph means" "．
A. grow taller B. change into soil
C. break into tiny pieces D. become colorful and energetic
3.Choose the answer that completes the web below．
A. Microbes are very small B. Microbes are all around us
C. People can't see microbes D. Food begins to smell bad
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Tiny plants and animals live all around us. We cannot see them because they are so small, but they are everywhere.
They live in the soil, the air, and in rivers and oceans. They grow on mountains and in caves. Some live in the ice at the north and south poles; some live where it is very hot. They are found throughout cities and in the country. They grow on other plants and animals. Some are even living on you, on your skin, hair, and inside your body, in your mouth, nose, and all through your intestines (肠).
These tiny plants and animals are called microbes. The word microbe is made from two other words: micro, meaning small, and bios, meaning life. So, microbe means small life.
Microbes have been on earth for a very long time. They may have been the first forms of life to be alive. Today there are more microbes in the world than all other living things.
People did not know microbes had existed (存在) long. They were too small for them to see.
But people did see many changes in their world—important changes. And they did not know what caused them. They saw food that they kept too long change color and begin to smell bad. They saw cuts and wounds grow red and painful and become infected. They saw old plants and leaves and trees crumble apart on the forest floor and disappear into the soil. Such changes were a natural part of the world, but people did not understand them. They did not know these changes were evidence (证据) of tiny plants and animals growing all around them.
1.Where do microbes live?
A. Only in the forest., B. Almost everywhere.
C. Most in very hot areas., D. Most in rivers and oceans.
2.The underlined phrase “crumble apart” in the last paragraph means “________”.
A. 开花结果, B. 化为春泥, C. 破裂腐烂, D. 芳香四溢
3.According to the passage, which is the most suitable to complete the web below?
A. Microbes are very small, B. Microbes are all around us
C. People can’t see microbes, D. Food begins to smell bad
4.The best title of the passage could be ________.
A. The smallest life around us, B. The origin (起源) of microbes
C. The place of microbes growing, D. The evidence of microbes growing
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Tiny plants and animals live all around us. We cannot see them because they are so small, but they are everywhere.
They live in the soil, the air, and in rivers and oceans. They grow on mountains and in caves. Some live in the ice at the north and south poles; some live where it is very hot. They are found throughout cities and in the country. They grow on other plants and animals. Some are even living on you, on your skin, hair, and inside your body, in your mouth, nose, and all through your intestines (肠).
These tiny plants and animals are called microbes. The word microbe is made from two other words: micro, meaning small, and bios, meaning life. So, microbe means small life.
Microbes have been on earth for a very long time. They may have been the first forms of life to be alive. Today there are more microbes in the world than all other living things.
People did not know microbes had existed (存在) long. They were too small for them to see.
But people did see many changes in their world—important changes. And they did not know what caused them. They saw food that they kept too long change color and begin to smell bad. They saw cuts and wounds grow red and painful and become infected. They saw old plants and leaves and trees crumble apart on the forest floor and disappear into the soil. Such changes were a natural part of the world, but people did not understand them. They did not know these changes were evidence (证据) of tiny plants and animals growing all around them.
1.Where do microbes live?
A. Only in the forest. B. Almost everywhere.
C. Most in very hot areas. D. Most in rivers and oceans.
2.The underlined phrase “crumble apart” in the last paragraph means “________”.
A. 开花结果 B. 化为春泥 C. 破裂腐烂 D. 芳香四溢
3.According to the passage, which is the most suitable to complete the web below?
A. Microbes are very small B. Microbes are all around us
C. People can’t see microbes D. Food begins to smell bad
4.The best title of the passage could be ________.
A. The smallest life around us B. The origin (起源) of microbes
C. The place of microbes growing D. The evidence of microbes growing
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All our food comes from the soil(土壤). Some of us eat meat, but animals live on plants. If there are no plants, we will have no animals and meat. So the soil is necessary for us to live.
The top of ground is usually covered with grass or other plants. Plants grow in soil, which has a dark color. This dark soil is humus. Dead leaves, dead plants and animals’ waste make it, but this takes a long time. When the humus has been made, plants can grow well in it.
All soil needs food. If we don’t give it any, the plants will be weak. Animals’ waste is the best food for the soil, but chemical fertilizers (化肥) are also very useful. The same crop (庄稼) should not be grown in the same place every year; it is better to have a different crop. A change of crop and the use of a good fertilizer will keep the land in good condition.
When the soil is dry, the wind blows it away. Sometimes heavy rain carries the humus down to a river. People should grow more and more trees and grass to stop wind from carrying the humus (腐殖土壤)away. It takes hundreds of years to make humus, and so we must save every bit of it. Without soil, where can we grow food?
1. From the text, we know people live on ___________.
A. animal B. plant
C. meat D. soil
2. We should ___________ to keep the soil.
A. give more fertilizers
B. grow a different crop every year
C. make more humus
D. grow more trees and grass
3. We should save every bit of humus, because ___________.
A. it takes a long time to make humus
B. sometimes the wind will blow the dry soil away
C. the chemical fertilizers are expensive
D. animals waste is the best food for the soil
4.From the passage, we know that soil is ___________ to people.
A. not helpful B. necessary
C. not important D. harmful
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All our food comes from the soil (土壤). Some of us eat meat, but animals live on plants. If there were no plants, we should have no animals and meat. So the soil is necessary for life.
The top of ground is usually covered with grass or other plants. Plants grow in soil, which has a dark color. This dark soil is humus, dead leaves, dead plants and animal waste make it, but this takes a long time. When the humus has been made, plants can grow well in it.
All soil needs food. If we don’t give it, any plants will be weak. Animals waste is the best food for the soil, but chemical fertilizers (化肥) are also very useful. The same crop should not be grown in the same place every year; it is better to have a different crop. A change of crop and the use of good fertilizer will keep the land in good condition.
When the soil is dry, the wind blows it away. Sometimes heavy rain carries the humus down to a river. People should grow more and more trees and grass to stop wind from carrying the humus away. It takes hundreds of years to make humus, and so we must save every bit of it. Without soil, where can we grow food?
1.From the text, we know people live on _______.
A. animal B. plant C. soil
2.The word “humus” means _____ in Chinese.
A. 微生物 B. 腐殖土 C. 粘土
3.We should _______ to keep the soil.
A. give more fertilizers
B. make more humus
C. grow more trees and grass
4.We should save every bit of humus, because ______.
A. it takes a long time to make humus
B. the more humus in the soil, the better plants grow
C. A and B
5.The best title of this text should be ______.
A. Soil is necessary to people
B. Soil’s food is chemical fertilizers
C. Humus is hard to make
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If all the plants on the earth die, _______ people _________animals will be able to live.
A. neither; nor B. both; and
C. not only; but also D. either; or
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If all the plants on the earth die, _______ people _________animals will be able to live.
A．neither; nor B．both; and C．not only; but also D．either; or
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All our food comes from the soil. Some of us eat meat, but animals live on plants. If there are no plants, we will have no animals and meat. So the soil is necessary for us to live. The top of ground is usually covered with grass or other plants. Plants grow in soil, which has a dark color. This dark soil is humus. Dead leaves, dead plants and animals’ waste make it, but this takes a long time.
When the humus has been made, plants can grow well in it. All soil needs food. If we don’t give it any, the plants will be weak. Animals’ waste is the best food for the soil, but chemical fertilizers (化肥) are also very useful. The same crop should not be grown in the same place every year. It is better to have a different crop. A change of crop and the use of a good fertilizer will keep the land in good condition.
When the soil is dry, the wind blows it away. Sometimes heavy rain carries the humus down to a river. People should grow more and more trees and grass to stop wind from carrying the humus away. It takes hundreds of years to make humus, and so we must save every bit of it. Without soil, where can we grow food?
1.From the text, we know people live on _________.
A. animal B. plant C. meat D. soil
2.The word ＂humus＂ means _________ in Chinese.
A. 微生物 B. 土壤 C. 腐殖土 D. 粘土
3.We should ________ to keep the soil.
A. give more fertilizers B. kill more animals
C. make more humus D. grow more trees and grass
4.We should save every bit of humus, because _________.
A. it takes a long time to make humus
B. the more humus in the soil, the better plants grow
C. the chemical fertilizers are expensive
D. A and B
5.The best title of this article should be _________.
A. Soil is necessary to people
B. The same crop can’t be grown in the same place every year
C. Soil’s food is chemical fertilizers
D. Humus is hard to make
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In the deserts of North Africa and Saudi Arabia lives the smallest of all foxes with the largest of ears. This animal is the fennec fox(大耳小狐).
Fennec foxes have ears that are 5 to 6 inches long. That's big for an animal that weighs less than four pounds. Their ears help shed (去除) body heat. And, as you may have guessed, they also provide great hearing.
It's also interesting to think about the hair of fennec foxes. Why would a fox that lives in the desert need a thick, fur coat? Actually, the desert isn't always warm. During the nighttime, a desert can be terribly cold! A fennec fox's fur keeps them warm during those desert nights. They also have long bushy tails that they use as a blanket. And the hair on their feet protects them from the hot sand in the daytime.
Fennec foxes live in small communities of dens (兽穴).They spend most of the day sleeping in their dens, out of the hot sun. Then, when night comes, they come out in search of food. In addition to their great hearing, fennecs also use their great sense of smell and big eyes to track down dinner.
