GMAT语法每日一题详解（4）

4.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.

(A) prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does
(B) prevents blood clots just as well as does a commonly used and a more expensive blood-thinning drug
(C) prevents blood clots just as well as will a commonly used and more expensive blood-thinning drug
(D) works just as well as a commonly used and more expensive blood-thinning drug at the prevention of blood clots
(E) works just as well as does a commonly used blood-thinning drug, which is also more expensive, at preventing blood clots

原文意思： 根据一个研究，阿司匹林干一个事情的效果和另一种药起的效果是一样的。

题目分析： 原文拿阿司匹林干的事情和另一种药干的事情所起的作用进行了一个比较，A 这个比较写的比较对应， 留着。 B 后面没有 does 就是阿司匹林干的事情和后面那种药进行比较了， 干掉。C 和 B 犯的错误类似。D 和 E 也没有加 does，选 A。