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题库 / Prep2007E1-SC-128
According to a study published in The New England Journal of Medicine, aspirin prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does.
prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does
prevents blood clots just as well as does a commonly used and a more expensive blood-thinning drug
prevents blood clots just as well as will a commonly used and more expensive blood-thinning drug
works just as well as a commonly used and more expensive blood-thinning drug at the prevention of blood clots
works just as well as does a commonly used blood-thinning drug, which is also more expensive, at preventing blood clots
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D: as the poster above was trying to explain, "work at xxxxx" is not an idiomatic expression here.
even if you don't know this, though, you should still be able to pick (a) over (d), because (a) is more direct and efficient in its language.
i.e., even if (d) were idiomatic (it isn't), it would still be inferior to (a):
works ... at the prevention of X
vs.
prevents X
there's no question which of these has greater economy of expression.
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