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  3. During the nineteenth century, when little was known about environmentalism and conservation, it was common to hear people in Eu

During the nineteenth century, when little was known about environmentalism and conservation, it was common to hear people in Eu

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问题     During the nineteenth century, when little was known about environmentalism and conservation, it was common to hear people in Europe and America say that the resources of the sea were unlimited. They believed the world and nature would【B1】______ reproduce all the resources they would need. For example, a【B2】______biologist writing in the mid-nineteenth century【B3】______that none of the great sea fisheries were to be【B4】______. Today, though, there is evidence that the resources of the sea are seriously endangered.
    【B5】______, 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【B6】______now included herring and crabs as well as the African elephant, Indian tiger, and the American eagle.
    【B7】______, the threats to fish are more【B8】______in some ways than the threats to animals and birds. This is because【B9】______. Hence, a decline in the fish supply could have extensive effects on hunger and population. Fishermen in the North Atlantic alone【B10】______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.【B11】______
【B8】
选项
答案alarming
解析 此处是比较句中作表语的多音节形容词，说明threats的严重程度。语义上表示“严重的”。
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大学英语四级

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