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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, bern 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 sguandered 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 coantless species, most【C9】______out before even【C10】______ catalogued by scientist.
【C10】
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答案being
解析 该空应填being，理由是befor引导的伴随状语属于被动语态。
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