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  3. It is a dream world, where chemists can turn a sow’s ear into a silk purse, where bioengineers can put a little hit of a sheep i

It is a dream world, where chemists can turn a sow’s ear into a silk purse, where bioengineers can put a little hit of a sheep i

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问题      It is a dream world, where chemists can turn a sow’s ear into a silk purse, where bioengineers can put a little hit of a sheep into a wolf--or vice versa--and where the life-styles of the rich are beamed by satellite  【C1】______ every upwardly mobile village on the planet. Thanks to science and technology, more people are consuming a more amazing array of worldly goods than at any time in history.
     But beneath the surface all is not well. Like Oscar Wilde’s fictional creation Dorian Gray, who stayed forever 【C2】______  while a portrait of him in the attic aged horribly, the modern economy masks a disfigured planet. The engine of consumption has scarred the land and stained the sea,  【C3】______  away at the foundations of nature and threatening to destroy humanity’s only means of survival. Today’s elderly, born at the beginning of last century, started life in a world  【C4】______  about 50% of its ancient forests still standing. Though far from pristine, it was a world of oceans and land masses teeming with all kinds of life. But those who will be born after the turn of the millennium will  【C5】______ of age to find that previous generations have squandered and defiled their inheritance, foreclosing some potions even as new ones were created. Our grandchildren may have  【C6】______  to conveniences that further reduce the drudgery of everyday life, but they will also inherit a planet with less than 20% of its original forests  【C7】______  , with most of the readily available freshwater already spoken for and much of the amble  【C8】______  under plough. They will inherit a stressed atmosphere and an unwanted legacy of toxic waste in the soil and water. Missing from the estate will be countless species, most 【C9】______  out before even  【C10】______  catalogued by scientist.
【C10】______
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答案being
解析 before引导伴随状语，而该状语是被动语态，因此填“being”。
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