随着GMAT改革的深入越来越多的学员感到迷茫和困惑到底GMAT路在何方，到底最新的机考题目难度如何.基于这样一个前提，我把GMATpre和OG真题按着题型进行逐题分析，找到最佳的考试考点。
GMAT语法的重点题型之一平行并列：
平行并列：见到平行看结构，形式功能要对称.就GMAT而言，平行并列是考试中的重点也是难点，英语称其为parallel structure: this is a little bit like making sure that the two sides of a mathematical equation are balance.就解题而言要求做到四个点。
形式对称
概念对等
功能相同
含义单一
一)形式对称：
指平行并列连接词前后的词形式上完全对称
下面以GMATpre test 1为例：
例1：The airline company, following through on recent warnings that it might start reducing service, announced that it was eliminating jet service to nine cities, closing some unneeded operations, and it grounded twenty-two planes.
(A) closing some unneeded operations, and it grounded
(B) closing some unneeded operations, and grounding
(C) was closing some unneeded operations, while it grounded
(D) it closed some unneeded operations and grounded
(E) it was closing some unneeded operations, and grounding
译文：航空公司遵照最近的警告它可能会开始减少服务而宣布它将会减少喷气机服务到九个城市,关闭不需要的操作和停飞22架飞机。