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一道GMAT的SC题目 32.A study commissioned by the Depart

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一道GMAT的SC题目 32.A study commissioned by the Depart
一道GMAT的SC题目
32.A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves,they will require less medication and gain weight quicker than do those raised in confinement.
(A) 同上
(B) associated with other calves,they require less medication and gain weight quicker than
(C) associate with other calves,they required less medication and will gain weight quicker than do
(D) associate with other calves,they have required less medication and will gain weight more quickly than do
(E) associate with other calves,they require less medication and gain weight more quickly than
想问下than的比较 后面什么情况下要加do
一道GMAT的SC题目 32.A study commissioned by the Depart
POE排除法:
associated与claves excercise时态不平行,排除A和B;
C和Dthey后面的require时态用错,且不与gain平行,排除C和D,选E
当然还有quicker形容词不可以修饰动词的错误,但以上两点足以判断答案.
than后面的do,实质上是倒装+省略
...than (do) those raised in confinement
倒装的原因:主语过长,谓语提前
省略问题:从逻辑上讲,than前后比较的是calves在不同生长环境下需要medication的多少和增重的速度比较,关键在于多少与速度,因此,than后面的谓语和宾语显然与前面的是一致的.显然,do的省略也不会使对句子的理解产生歧义或影响整句逻辑.重在逻辑而不是语法或词的用法.