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
我看到的版本给的答案是E但是我不知道这个答案是否可信
我个人认为D是对的 所以想请教大家
我觉得D肯定是不对的，因为than后面的比较对象是burning....与前面的vehicles不一致。
但是E我也怀疑有问题，因为less of可以修饰复数形式的pollutants吗？我不确定。
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