2. 外语
  3. It’s difficult to imagine the sea ever running out of fish. It’s so vast, so deep, so mysterious. 【B1】______, it’s not bottomles

It’s difficult to imagine the sea ever running out of fish. It’s so vast, so deep, so mysterious. 【B1】______, it’s not bottomles

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问题     It’s difficult to imagine the sea ever running out of fish. It’s so vast, so deep, so mysterious. 【B1】______, it’s not bottomless. Over-fishing, coupled with destructive fishing practices, is killing off the fish and【B2】______ their environment.
    Destroy the fish, and you destroy the fishermen’s【B3】______ of living. At least 60 percent of the world’s commercially important fish【B4】______ are already over-fished, or fished to the limit. As a result, governments have had to【B5】______ some areas of sea to commercial fishing.
    Big, high-tech fleets ensure that everything in their path is【B6】______ water. Anything too small, or the wrong thing, is【B7】______ either dead or dying. That’s an average of more than 20 million metric tons every year.
    When you consider that equals a quarter of the world’s catch, you begin to see the size of the problem.
    In some parts of the world, for every kilogram of prawns(对虾)caught, up to 15 kilograms of unsuspecting fish and other【B8】______ wildlife die, simply for being in the wrong place at the wrong time.
    True, some countries are beginning to deal with this problem, but it’s vital we find the【B9】______ways of fishing before every ocean becomes a dead sea
    It would make sense to give the fish enough time to recover, grow to full size and reproduce, then catch them in a way that doesn’t kill other【B10】______ sea life.
【B5】
选项
答案close down
解析 根据空格前的had to可知，此空需要原形动词(词组)。close down“关闭，(使)停业”。
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