There is a widespread belief among the science world we keep on the earth as we are d——青夏教育精英家教网—

摘要： There is a widespread belief among the science world we keep on the earth as we are doing today, the existence of us humans on this planet will be out of the question in some years yet to come. A. if; polluting B. if; to pollute C. that if; to pollute D. that if; polluting

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There is a widespread belief among the science world ____ we keep on _____ the earth as we are doing today,
the exist ence of us humans on this planet will be out of the question in some years yet to come.

[ ]

A. if; polluting
B. if; to pollute
C. that if; to pollute
D. that if; polluting

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There is a widespread belief among the science world _______we keep on ______ the earth as we are doing today, the existence of us humans on this planet will be out of the question in some years yet to come.

A. if; polluting B. if; to pollute C. that if; to pollute D. that if; polluting

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