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  3. People living on parts of the south coast of England face a serious problem. In 1993, the owners of a large hotel and of several

People living on parts of the south coast of England face a serious problem. In 1993, the owners of a large hotel and of several

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问题      People living on parts of the south coast of England face a serious problem. In 1993, the owners of a large hotel and of several houses discovered, to their horror, that their gardens had disappeared overnight. The sea had eaten into the soft limestone cliffs on which they had been built. While experts were studying the problem. The hotel and several houses disappeared altogether, sliding down the cliff and into the sea.
     Erosion of the white cliffs along the south coast of England has always been a problem but it has become more serious iii recent years. Dozens of homes have had to be abandoned as the sea has crept farther and farther inland. Experts have studied the areas most affected and have drawn up a map for local people, forecasting the year in which their homes will be swallowed up by the hungry sea.
     Angry owners have called on the Government to erect sea defenses to protect their homes. Government surveyors have pointed out that in most cases, this is impossible. New sea walls would cost hundreds of millions of pounds and would merely make the waves and currents go further along the coast, shifting the problem from one area to another. The danger is likely to continue, they say, until the waves reach an inland area of hard rock which will not be eaten as limestone is. Meanwhile, if you want to buy a cheap house with an uncertain future, apply to a house agent in one of the threatened areas on the south coast of England. You can get a house for a knockdown price but it may mm out to be a knockdown home.
It is not feasible to build sea defenses to protect against erosion because ______
选项 A、house agents along the coast do not support the idea
B、it is too costly and will endanger neighboring areas
C、the government is too slow in taking action
D、they will be easily knocked down by waves and currents
答案B
解析 根据文章第三段的"New sea walls cost hundreds of millions of pounds and would merely make the waves and currents go further along the coast，shifting the problem from one area to another．”可知，修建新的海上防御墙不仅耗资巨大，而且会使海浪沿海岸线移动，将问题从一个区域转移到另一个区域，由此可见，修建防御墙的建议并不可行，因此只有B 符合题意
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