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As a defense against air－pollution damage, many plants and animals ______ a substance to a
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There are many animals, however, ____ never play.A: whatB: whichC: thatD: where
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In the long history of natural evolution,many kinds of animals have______from the earth.A．
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The national parks are very important for preserving many animals, who would ______run the
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There are among many American families______.A.li
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Many newcomers complain of the rapid ______ of li
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Many animals in the forest died in last_____.
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