10. 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
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[1] 2 [3] [4] 
11. Similar to rising interest rates， consumer and producer prices have been rising.
（A） Similar to rising interest rates， consumer and producer prices have been rising.
（B） Consumer and producer prices have been rising， as have interest rates.
（C） As interest rates are rising， so have consumer and producer prices.
（D） Consumer and producer prices have been rising， like interest rates do.
（E） Consumer and producer prices， as interest rates， have been rising.
12. Although fruit can no longer grow once it is picked， it continues for some time to respire， taking in oxygen and giving off carbon dioxide， similar to the way human beings breathe.
（A） similar to the way human beings breathe
（B） similarly to human beings who are breathing
（C） just like the breathing of human beings
（D） as human beings when breathing
（E） just as human beings do when they breathe
13. The United States government employs a much larger proportion of women in trade negotiations
than any government.
（A） a much larger proportion of women in trade negotiations than any
（B） a much larger proportion of women in trade negotiations than does any other
（C） much larger proportions of women in trade negotiations than has any
（D） proportions of women in trade negotiations that are much larger than any
（E） proportions of women in trade negotiations that are much larger than any other
14. A migraine typically afflicts one side of the head， lasts for hours or days， and may recur as infrequently as once every other month or often， as daily.
（A） as infrequently as once every other month or often， as
（B） as infrequently as once every other month or as often as
（C） infrequently， as often as once every other month， or often， like
（D） infrequently， like once every other month， or often， like
（E） infrequently， like once every other m