GMAT语法题OG详解140,140

GMAT语法题OG详解140/140

GMAT语法改错的难度一方面来自题干，另一方面来自选项，因为我们要依靠选项之间的差别来获得信息、寻求提示，其实这就反映了GMAT语法改错答案的特点--永远只有相对正确而不存在绝对正确。接下来小编就给大家介绍一下GMAT语法题，希望对大家备考GMAT语法考试有帮助。

140. Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

(A) has been dated to be 3.47 billion years old and thus is

(B) has been dated at 3.47 billion years old and thus

(C) have been dated to be 3.47 billion years old and thus are

(D) have been dated as being 3.47 billion years old and thus

(E) have been dated at 3.47 billion years old and thus are

答案解析如下：

(A)has been dated to be 3.47 billion years old and thus is

【错误1】主谓一致：“has been dated”和“samples”主谓不一致。

【错误2】固定搭配：不存在“be dated to be”表达“测定年代为”的用法。

(B)has been dated at 3.47 billion years old and thus

【错误】主谓一致：见(A)中【错误1】。

(C)have been dated to be 3.47 billion years old and thus are

【错误】固定搭配：见(A)中【错误2】。

(D)have been dated as being 3.47 billion years old and thus

【错误】固定搭配：不存在“be dated as being”表达“测定年代为”的用法。

(E)have been dated at 3.47 billion years old and thus are

【正确】“have been dated at 3.47 billion years old”使用了正确的固定搭配。“thus are……”和“have been dated at……”是“Rock samples”的两个对等的谓语动词结构，因此尽管两者外表上不相似(连时态也不相同)，却可以用“and”平行在一起(只要功能一致、概念对等的对象都可以平行)。

【大意】一个同灭绝恐龙的6英里宽小行星两倍大的小行星上取下的岩石样本测定年代为距今34.7亿年，因此是最早的小行星撞地球的证据。

【最优解题思路推荐】

根据主谓一致原则立即排除(A)、(B)，即便不确定“be dated at”是正确搭配，也可以根据(C)中“to be”表达“目的是”和“将会是”意思不合理，(D)中“as being”的“being”多余故不具有简洁性而选择最优的“be dated at”。因此选择(E)。