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 wetland
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：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。B．pockets of wetland小快湿地。coral珊瑚；volcano火山；bees and wasps蜜蜂和黄蜂。