Prep一道纠结的题目，求指点～

wjk · 发表于 2011-4-17 19:55:13

182.(32026-!-item-!-188;#058&006326)

The organic food industry has organized a successful grassroots campaign—using Web sites, public meetings, and also mass mailings—that have convinced the Department of Agriculture to change the proposed federal regulations for organically grown food.

A. using Web sites, public meetings, and also mass mailings—that have convinced

B. using Web sites, public meetings, and mass mailings—that has convinced

C. by using Web sites, public meetings, and mass mailings—in convincing

D. by the use of Web sites, public meetings, as well as mass mailings—that convinced

E. which used Web sites, public meetings, and mass mailings—in convincing
答案：C
想请问一下：（1）加不加by有没有区别（2）In convincing的表述错在哪里
求高手指点，感激不尽！！！

lonelyorchid · 发表于 2011-4-18 10:43:28

此题第一个应该排除的就是C & E，campaign for/against/to都对，唯独in doing错

A, 主谓一致错
D, by错
by 表示方式、方法，修饰主句谓语；破折号表示说明，和by意思重复。其次从句时态错，主句已经完成时了……

wjk · 发表于 2011-4-18 11:57:29

原来如此，明白了，谢谢！！！
（之前答案写错了答案是B）

幸运四叶草 · 发表于 2011-10-20 00:11:11

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幸运四叶草 · 发表于 2011-10-22 00:25:54

幸运四叶草 · 发表于 2011-10-23 22:19:18

本贴相关题目 GMATPrep-2007E2-SC-23 | TN-24-SC-27 (BGCH)

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