Choose the letter A, B, C, or D to indicate the correct word for each of the blanks from 41 to 45.

When the word "endangered" is mentioned, people usually think of particular species, like the panda or whooping crane. However, we would like to encourage you to think about (41)_____ in a broader context. It is (42)________, the physical places where species live and interact with one another. Although the development of special breeding programs, also known as captive conservation, may help some species in some cases, it is clearly not (43)________answer to the global problem. Indeed, (44)________we are able to protect natural areas where endangered species actually live, they have no future. Species become endangered for a wide (45)________of reasons. By analyzing and grouping many individual cases, however, we find the same broad causes appear again and again. They are Habitat Destruction, Exotic Species, and Overexploitation. Among other factors threatening particular species are limited: distribution, disease, and pollution.

Điền vào số (45)

A. variety

B. commerce

C. extinction

D. destruction

Choose the letter A, B, C, or D to indicate the correct word for each of the blanks from 41 to 45.

When the word "endangered" is mentioned, people usually think of particular species, like the panda or whooping crane. However, we would like to encourage you to think about (41)_____ in a broader context. It is (42)________, the physical places where species live and interact with one another. Although the development of special breeding programs, also known as captive conservation, may help some species in some cases, it is clearly not (43)________answer to the global problem. Indeed, (44)________we are able to protect natural areas where endangered species actually live, they have no future. Species become endangered for a wide (45)________of reasons. By analyzing and grouping many individual cases, however, we find the same broad causes appear again and again. They are Habitat Destruction, Exotic Species, and Overexploitation. Among other factors threatening particular species are limited: distribution, disease, and pollution.

Điền vào số (44)

A. so       

B. but       

C. if    

D. unless

Choose the letter A, B, C, or D to indicate the correct word for each of the blanks from 41 to 45.

When the word "endangered" is mentioned, people usually think of particular species, like the panda or whooping crane. However, we would like to encourage you to think about (41)_____ in a broader context. It is (42)________, the physical places where species live and interact with one another. Although the development of special breeding programs, also known as captive conservation, may help some species in some cases, it is clearly not (43)________answer to the global problem. Indeed, (44)________we are able to protect natural areas where endangered species actually live, they have no future. Species become endangered for a wide (45)________of reasons. By analyzing and grouping many individual cases, however, we find the same broad causes appear again and again. They are Habitat Destruction, Exotic Species, and Overexploitation. Among other factors threatening particular species are limited: distribution, disease, and pollution.

Điền vào số (43)

A. a   

B. an   

C. the   

D. this

Choose the letter A, B, C, or D to indicate the correct word for each of the blanks from 41 to 45.

When the word "endangered" is mentioned, people usually think of particular species, like the panda or whooping crane. However, we would like to encourage you to think about (41)_____ in a broader context. It is (42)________, the physical places where species live and interact with one another. Although the development of special breeding programs, also known as captive conservation, may help some species in some cases, it is clearly not (43)________answer to the global problem. Indeed, (44)________we are able to protect natural areas where endangered species actually live, they have no future. Species become endangered for a wide (45)________of reasons. By analyzing and grouping many individual cases, however, we find the same broad causes appear again and again. They are Habitat Destruction, Exotic Species, and Overexploitation. Among other factors threatening particular species are limited: distribution, disease, and pollution.

Điền vào số (42)

A. plants 

B. conservations 

C. habitats 

D. organizatio

Choose the letter A, B, C, or D to indicate the correct word for each of the blanks from 41 to 45.

 When the word "endangered" is mentioned, people usually think of particular species, like the panda or whooping crane. However, we would like to encourage you to think about (41)_____ in a broader context. It is (42)________, the physical places where species live and interact with one another. Although the development of special breeding programs, also known as captive conservation, may help some species in some cases, it is clearly not (43)________answer to the global problem. Indeed, (44)________we are able to protect natural areas where endangered species actually live, they have no future. Species become endangered for a wide (45)________of reasons. By analyzing and grouping many individual cases, however, we find the same broad causes appear again and again. They are Habitat Destruction, Exotic Species, and Overexploitation. Among other factors threatening particular species are limited: distribution, disease, and pollution.

Điền vào số (41)

A. development

B. endangerment

C. pollution

D. contamination

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapted. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, even affect organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. The periodic extinction might be due to intersection of the earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

Question50: In paragraph 3, the author makes which of the following statements about a species' survival?

A. it may depend on chance events.

B. it does not vary greatly from species to species.

C. it reflects the interrelationship of many species.

D. it is associated with astronomical conditions.

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

     It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapted. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

     The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, even affect organisms not living in the oceans. Such a change would probably lead to a mass extinction.

     One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. The periodic extinction might be due to intersection of the earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

In paragraph 3, the author makes which of the following statements about a species' survival?

A. it may depend on chance events

B. it does not vary greatly from species to species

C. it reflects the interrelationship of many species

D. it is associated with astronomical conditions

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapted. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, even affect organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. The periodic extinction might be due to intersection of the earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

In paragraph 3, the author makes which of the following statements about a species' survival?

A. it may depend on chance events.

B. it does not vary greatly from species to species

C. it reflects the interrelationship of many species.

D. it is associated with astronomical conditions.