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【单选题】Their chief aim is to reduce ________ pollution in the area.
A.
deal with
B.
the amount of
C.
rely on
D.
range from
【单选题】Their chief aim is to reduce _________ pollution in the area.
A.
the amount of
B.
deal with
C.
range from
D.
divide into
【简答题】Their aim is to reduce the toxic levels of vehicle exhaust e________ (加s). 他们的目标是降低汽车排放尾气的毒性。
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