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  3. In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to

In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to

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问题     In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program (国家海洋保护区计划) . The【C1】________ of this legislation was to provide protection to selected coastal habitats similar to that existing for land areas. The designation of a marine sanctuary indicates that it is a(n)【C2】________ area, just as a national park is. People are permitted to visit and observe there, but living organisms and their environments may not be harmed or【C3】________ .
    70 sites were【C4】________ proposed as candidates for sanctuary status. Two and a half decades later, only fifteen sanctuaries had been designated, with half of these established after 1978. They range in size from the very small Fagatele Bay National Marine Sanctuary in American Samoa to the Monterey Bay National Marine Sanctuary in California,【C5】________ over 15,744 square kilometers.
    The National Marine Sanctuaries Program is a crucial part of new management practices in which whole communities of species, and not just individual【C6】________ , are offered some degree of protection. Only in this way can a【C7】________ degree of marine species diversity be maintained in a setting that also maintains the natural relationships among these species.
    Outside the United States, marine protected-area programs exist as marine parks, reserves, and preserves. Over 100 designated areas exist around the【C8】________ of the Carbbean Sea. Others range from the well-known Australian Great Barrer Reef Marine Park to lesser-known parks in countries such as Thailand and Indonesia, where tourism is【C9】________ growing pressures on fragile coral reef systems. As state, national, and international agencies come to recognize the importance of conserving marine biodiversity, marine protected areas, whether as sanctuaries, parks, or coastal reserves, will play an increasingly【C10】________ role in preserving that diversity.
    A. reasonable      B. initially       C. conscious      D. placing
    E. recovered       F. protected       G. approval       H. intent
    I. significant     J. removed         K. eventually     L. extending
    M. species         N. periphery       O. depth
【C4】
选项
答案B
解析 上下文题。根据词性，此处应当填入副词。可选范围是“initially (起初地)，eventually(最终)”。根据下文Two and a half decades later, only fifteen sanctuaries had been designated“25年后，只指定了15个保护区”，而该段首句提到“有70处被提议为候选保护区域”，这些信息表明，一开始(起初)的计划在之后发生了改变，符合题意的选项只有initially。
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