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题库 / Prep2007E2-SC-90
Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have been implicated in global warming.
of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have
of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gases having
of comparable size, and also they emit far fewer carbon dioxide and other gases that have
that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have
that have a comparable size, as well as emitting far fewer carbon dioxide and other gases having
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note that you can't read this as "less (carbon dioxide ... and other gases...)", either -- i.e., with "less" applying to both things -- because "less other gases" doesn't make sense.
you could have "fewer gases" (= not as many different kinds), or "less OF the gases" (= a smaller total quantity)... but not "less gases".
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