题目内容
12．Some people ride bikes to work instead of driving in order to reduce pollution（ ）| A． | water | B． | air | C． | soil | D． | White． |
分析 一些人骑自行车去上班来代替开车去上班，为了减少空气污染．
解答 答案：B
A表示水；B表示空气；C表示土壤；D表示白色．开车上班造成的是空气污染，此题说骑自行车代替开车应该是减少空气污染，选B．
点评 此题首先要熟悉更选项的意思，再结合句意来选出正确的答案．
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