Read the passage and choose the best answer for each question below.
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 able to adapt. 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, affection even 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. This 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 tat 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 evolutionary history may reflect a sequence of essentially random events.
 
Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change?
A.Temperature changes 
B.Availability of food resources
C.Introduction of new species 
D.Competition among species

       Read the passage and choose the best answer for each question below.
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 able to adapt. 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, affection even 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. This 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 tat 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 evolutionary history may reflect a sequence of essentially random events.
 
What does the author say in paragraph 1 regarding most species in Earth’s history
 
A.They have remained basically unchanged from their original forms.
B.They have been able to adapt to ecological changes.
C.They have caused rapid change in the environment.
D.They are no longer in existence.

       Read the passage and choose the best answer for each question below.
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 able to adapt. 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, affection even 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. This 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 tat 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 evolutionary history may reflect a sequence of essentially random events.
 
The word “ultimately” in line 7 is closest in meaning to
A.exceptionally     
B.dramatically     
C.eventually   
D.unfortunately

       Read the passage and choose the best answer for each question below.
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 able to adapt. 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, affection even 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. This 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 tat 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 evolutionary history may reflect a sequence of essentially random events.
 
The word “it” in line 2 refers to
A.environment
B.species   
C.extinction
D.99 percent

_____(43)
A.carry
B.deal
C.cooperate
D.combine

Read the passage and choose the best answer among A,B,C,D for each gap to complete it.                     
      Most people feel that when they dream, they are (35)________ off to another world. On the (36)________, dreams are often  connected to our daily lives. When our whole (37)_________ is filled with something, when we are either very  upset (38)________ when we are in good spirit, a dream will represent this reality in symbols. It is often (39)_______ that we benefit from dreams because they help the spirit to heal itself when things (40)__________ wrong. Dreams are therefore a kind of escape, almost a holiday from (41)__________ life, with its fears and responsibilities. It is, however, a strange kind of holiday because whether we have a wonderful time or whether it turns (42)_________ to be a nightmare, we quickly forget it. Most dreams disappear forever, (43)_________ you are one of those people disciplined enough to write them down as soon as you (44)_________.
(44)_________
A.wake up   
B.arise 
C.awake    
D.rise up

Read the passage and choose the best answer among A,B,C,D for each gap to complete it.                     
      Most people feel that when they dream, they are (35)________ off to another world. On the (36)________, dreams are often  connected to our daily lives. When our whole (37)_________ is filled with something, when we are either very  upset (38)________ when we are in good spirit, a dream will represent this reality in symbols. It is often (39)_______ that we benefit from dreams because they help the spirit to heal itself when things (40)__________ wrong. Dreams are therefore a kind of escape, almost a holiday from (41)__________ life, with its fears and responsibilities. It is, however, a strange kind of holiday because whether we have a wonderful time or whether it turns (42)_________ to be a nightmare, we quickly forget it. Most dreams disappear forever, (43)_________ you are one of those people disciplined enough to write them down as soon as you (44)_________.
(43)_________
A.except that  
B.therefore  
C.thus    
D.unless

_____(42)
A.home
B.family
C.house
D. household

Read the passage and choose the best answer among A,B,C,D for each gap to complete it.                     
      Most people feel that when they dream, they are (35)________ off to another world. On the (36)________, dreams are often  connected to our daily lives. When our whole (37)_________ is filled with something, when we are either very  upset (38)________ when we are in good spirit, a dream will represent this reality in symbols. It is often (39)_______ that we benefit from dreams because they help the spirit to heal itself when things (40)__________ wrong. Dreams are therefore a kind of escape, almost a holiday from (41)__________ life, with its fears and responsibilities. It is, however, a strange kind of holiday because whether we have a wonderful time or whether it turns (42)_________ to be a nightmare, we quickly forget it. Most dreams disappear forever, (43)_________ you are one of those people disciplined enough to write them down as soon as you (44)_________.
(42)_________
A.off  
B.up     
C.out    
D.down

Choose the answer among A,B,C,D whose underlined part needs correcting to make sentences below complete:
The professor told him (A) to write a short but it must becomprehensive (B) paper about (C) the experiment (D)
A.him
B. it must becomprehensive 
C.about 
D.experiment