\(Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions. Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine come from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundreds of other products. Rain forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same percentage of the world oxygen. Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life. Saving rain forests is an international problem. One country, or even a few countries, cannot solve the problem alone. The nations of the world must work together to find a solution before it is too late. 1. What percent of the earth’s area do rain forests cover? A. Only 6 percent B. 20 percent C. less than 6 percent D. over 6 percent 2. How many known kinds of plants and animals call the rain forests their home? A. B. C. D. 3. What percent of the total rainfall on the earth does the Amazon rain forests receive? A. about 20 to 30 B. less than 30 C. exactly 30 to 40 D. about 30 to 40 4. According to some scientists, what will the decreasing size of rain forests affect on the earth? A. oxygen B. climate C. plants D. only animals 5. According to the passage, what must the nations of the world do to find a solution? A. work together B. work alone C. save rain forests only D. save their lives \)

Tìm lỗi sai và sửa lại, giải thích 

Because of the flood happened, many families lost their houses.

He had not idea how difficult the job was.         

Scientists have identified a link between an healthy diet and diseases. 

Plans grow(46) almost every part of the world. We see(47) plants as flowers, glass, and tree nearly every day. Plants grow high on moutaintops, far in the oceans, and in many deserts and(48) regions

Without plants, there could be not life on earth. Man could not live without air of food and so he could not live without plants. The oxygen in the air we breathe comes from plants. The food we eat also comes from plants or from animals that eat plants. We build houses and make many(49) products from lumber cut from trees. (50) of our clothing is made from the fitbers of the cotton plants.

Scientists belive there are more than 350,000 species of plants, but no one knowns for(51). Some of the smallest plants, called diatoms, can be seen only with a(52). A drop of the water may hould as many as 500 diatoms. The largest living things are the giant sequoia trees of California. Some of them stand more than 290 feet high and measure over 30 feet wide

Scientist(53) all living things into two main groups - plants and animals. It is usually easy to tell the two(54). Almost all kinds of plants stay in one place, but nearly all species of animals move about under their own power. Most plants make their own food from air, sunglight, and water. Animals cannot make their own food. The basic units of all life, called cells, are also different in plants and animals. Most plants have thick wall that(55) a material called cellulost. Animal cells dl not have this material.

Ae giúp mjk nhanh với

WHY DO ANIMALS GO EXTINCT?

Different kinds of animals have appeared and disappeared throughout Earth’s history. Some animals go extinct because the climate (4)_______ they live changes. The climate may become wetter or drier. It may become warmer or cooler. If the animals cannot change, or adapt, to the new climate, they die.

Some animals go extinct because thay cannot (5) _______ with other animals for food. Some animals go extinct because they are killed by enemies. New kinds of animals are always evolving. Evolving means that the animals are changing (6) _______ from generation to generation. Small differences between parents, children, and grandchildren slowly add up over many, many generations. Eventually, a different kind of animal evolves.

Sometimes many of the animals on Earth go extinct at the (7) _______ time. Scientists call this a mass extinction. Scientists think there (8) _______ at least five mass extinctions in Earth’s history. The last mass extinction happened about 65 million years ago. This mass extinction killed off the dinosaurs.

Question 4: A. where B. which C. when D. what

Question 5: A. complete B. find C. compete D. exist

Question 6: A. accidentally B. suddenly C. quickly D. slowly

Question 7: A. same B. similar C. different D. various

Question 8: A. has been B. have been C. will be D. are

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (46) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (47) ______ and quantity of water in the world. 

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (48) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again. 

One of the (49) ______ about water is distribution. Water is not always distributed where the large (50) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.

Điền ô số 47

A. quality

B. condition

C. situation

D. characteristics

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (44) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (45) ______ and quantity of water in the world.

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (46) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again.

One of the (47) ______ about water is distribution. Water is not always distributed where the large (48) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.

Điền vào ô số 45

A. quality

B. condition

C. situation

D. characteristics

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (46) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (47) ______ and quantity of water in the world. 

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (48) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again. 

One of the (49) ______ about water is distribution. Water is not always distributed where the large (50) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons

Điền ô số 50

A. population

B. men

C. women

D. people

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (46) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (47) ______ and quantity of water in the world. 

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (48) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again. 

One of the (49) ______ about water is distribution. Water is not always distributed where the large (50) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.

Điền ô số 46

A. in

B. without

C. for

D. with

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (46) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (47) ______ and quantity of water in the world. 

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (48) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again. 

One of the (49) ______ about water is distribution. Water is not always distributed where the large (50) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.

Điền ô số 48

A. gets

B. arrives

C. goes

D. comes

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Water is necessary for life. People can live only a few days (44) _____ it. Yet nearly 25 million people die each year because of it. Both industrial nations and less-developed countries are worried about the (45) ______ and quantity of water in the world.

Even though people, animals, agriculture, and industry use a lot of water, there is more than enough on the Earth. Water covers about three-fourths of the Earth's surface. However, 97.4 percent of it is salt water. Three-fourths of the Earth's fresh water is frozen in glaciers and in the great polar ice caps. Most of the water we use (46) _____ from rivers, lakes, and the atmosphere. Less than one percent of the Earth's water is usable, and we use it over and over again.

One of the (47) ______ about water is distribution. Water is not always distributed where the large (48) ______ centers are. Some regions get enough rain, but it is all in one or two short rainy seasons.

Điền vào ô số 47

A. facts

B. things

C. problems

D. cases