问题
单项选择题
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
答案
参考答案：B
解析：名词辨析。swamp沼泽，湿地，煤层聚水洼：The swamp country is inclined to poach in winter．这片沼泽地带在冬季一踏就陷下去了。pockets of wet land小块湿地。coral珊瑚；volcano火山；bees and wasps蜜蜂和黄蜂。