标题: 一道充满争议的题 [打印本页] 作者: 莞尔jasmine 时间: 2012-9-15 17:48 标题: 一道充满争议的题 今天看前人讨论这道题 164. Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel. (A) less of certain pollutants than the burning of gasoline or diesel fuel (B) fewer of certain pollutants than burning gasoline or diesel fuel do (C) less of certain pollutants than gasoline or diesel fuel (D) fewer of certain pollutants than does burning gasoline or diesel fuel (E) less of certain pollutants than those burning gasoline or diesel fuel
说正确答案E选项是把do省略了因为不会引起歧义。但个人认为省略了会变成宾语比较，所以个人对此题的理解是those指代vehicles,burning做非谓语动词和powered平行(前面被动后面主动）这样E选项就是最合适平行的选项。vehicles powered by natural gas emit less of certain pollutants than vehicles burning gasoline or diesel fuel.