摘要：16．-Why does the Lake smell terrible? -Because large quantities of water . A. have polluted B. is being polluted C. has been polluted D. have been pollutedu
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Why does the Lake smell terrible?
-Because large quantities of water .
A. have polluted B. is being polluted C. has been polluted D. have been polluted
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-Because large quantities of water .
A. have polluted B. is being polluted C. has been polluted D. have been polluted
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-Because large quantities of water__________.
A. have polluted B. is being polluted C. has been polluted D. have been polluted
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