【单选题】
One of the effective ways to lessen environmental pollution is the reservation and protection of more swamps .
A.vast thick corals
B.pockets of wet land
C.warm volcanoes
D.millions of bees and wasps
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根据网考网移动考试中心的统计,该试题:
6%的考友选择了A选项
86%的考友选择了B选项
2%的考友选择了C选项
6%的考友选择了D选项