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2015年12月英语四级考试模拟试�(一)

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Directions:In this section,you will hear a passage three times. When the passage is read for the first time, you should,listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks with the exact words you have just heard. Finally,when the passage is read for the third time,you should check what you have written.
�音频,回答27-36题

Dung the nineteenth century,when little was known about environmentalism and conservation,it was common to hear people in Europe and America say that there sources of the sea(26)_____.They believed the world and nature would continuously reproduce all the resources they would need. For example, a(27)_____ biologist writing in the mid-nineteenth century commented that none of the great sea fisheries were to be(28)_____. Today,though,there is evidence that the resources of the sea are seriously endangered.
(29)_____, environmentalists have focused their attention on the land and air. Recently, however, they are beginning to discover that the resources of the sea are in as much danger. The list of endangered(30)_____ now included herring and crabs as well as the African elephant,Indian tiger, and the American eagle.
Furthermore,the threats to fish are more(31)_____ in some ways than the threats to animals and birds. This is because fish are a much more needed food source,and people(32)_____ depend on fish as an important part of their diet. Hence,a decline in the fish supply could have(33)_____ effects on hunger and population. Fishermen in the North Atlantic alone annually harvest 20 billion pounds of fish to(34)_____ food demand,but the world needs to recognize that these practices cannot continue without depleting fish reserves within the next few years. Rapidly declining sea resources in many parts of the world are problems that cannot be ignored any longer. Unlike the(35)_____ in the nineteenth century,we now know that food supplies in the sea cannot last forever.
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