not…but consisted of…
77. (28689-!-item-!-188;#058&003708) Scientists have found signs that moving water changed the chemical makeup of the surface of Mars
(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was (C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as (D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than (E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was
考点: 有效用词（Diction）… 平行对称（Parallelism）…逻辑表达（Logical Predication）…习惯用 语（Idiom）
1) 习惯用法:as…as; more…than
2) GMAT考试中经常出现将相等比较as...as和more...than...形式比较合并在一起写的错误或者故意
复杂化的表示方法;正确表达应该是:as least as great as或者as great as or greater than
3) 并列句主语相同,应该省略重复的主语
4) 在没有明显时间证据的情况下,并列成分尽量使用同一个时态
(A) 从逻辑上看conclude这个动作应该和found这个动作构成因果关系的,平等的两个动作,而不应该 构成主要和次要成分,因此therefore concluding应该改为and therefore have concluded结构跟主句中
的have found构成平等的成分; its指代不清,上一个分句中存在多个单数名词moving water, surface;
as …than结构不符合习惯用法
(B) 错误同A; as much water or more as表达不正确
(C) 正确，Scientists have found…and have therefore concluded结构平行; planet’s crust消除了its
的指代模糊; three times as much as符合习惯用法
(D) its指代不清; as much water, or more, than表达不正确; they重复,应该去掉
(E) 没有时间证据,concluded应该改为现在完成时,跟前一个并列成分使用同一个时态; three times
more water as表达不正确
句子结构: Scientists have found…and have therefore concluded that…
78. (28735-!-item-!-188;#058&003712)
The cottontail rabbit population in Orange County, California, has increased unchecked in recent
woodlands. (A) years as a result of the removal of
(B) years as a result of removing (C) years, resulting from the removing of (D) years, which is a result of removing (E) years, which is a result of the removal of
