Every means ______ prevent the water from ______.
A.are used to; polluting | B.is used to; polluting |
C.is used to; polluted | D.is used to; being polluted |
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Every means ______ prevent the water from ______.
A.are used to; polluting | B.is used to; polluting |
C.is used to; polluted | D.is used to; being polluted |