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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
________ his poor English, he managed to communicate his problem very clearly.
A.Because                  
B.Even though  
C.Because of      
D.In spite of
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Exercise 8: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions
It is estimated that over 99 percent of all species that have 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 extinction 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, affecting 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 intensive 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 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 evolutionary history may reflect a sequence of essentially random events.
According to paragraph 2, evidence from fossil fuels suggests that ________ .
A.extinction of species has occurred from time to time throughout Earth's history
B.dinosaurs became extinct much earlier than scientists originally believed
C.extinction on Earth have generally been massive
D.there has been only one mass extinction in Earth's history

Exercise 5: 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
A YEAR WITH OVERSEAS VOLUNTEERS
I was with Overseas Volunteers (OV) for a year after leaving university, and I was sent to an isolated village in Chad, about 500 kilometers from the capital N'Djamena. Coming from a rich country, I got quite a shock, as conditions were much harder than I had expected. But after a few days I got used to (11)_______ there. The people were always very friendly and helpful, and I soon began to appreciate how beautiful the countryside was.
One of my jobs was to supply the village (12)______ water. The well was a long walk away, and the women used to spend a long time every day (13)______ heavy pots backwards and forwards. So I contacted the organization and arranged to have some pipes delivered. (14)______ these pipes were not really perfect, they still made a great difference to the villagers.
All in all, I think my time with OV was a good experience. Although it was not paid, it was well worth doing and I would recommend it to anyone (15)______ was considering working for a charity.
(12) 
A.on                           
B.for                                       
C.with                                    
D.from

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