请教大牛们2道题目

1. Inuits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the North Pacific and northern Alaska.

(B)isolated from contact with Europeans longer than

(D)isolated from contact with Europeans longer than were (为什么要加这个were呢）

2. Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised production efficiency in various industries.

(A) fatigue among shift workers, and have raised

(C) and fatigue among shift workers while raising

第一次发贴，小女子在此谢过！

欢迎来到CD。

请楼主在标题里面给出题目出处，方便大家回帖，方便后人查询，谢谢啊

另外，多个题目，恳请一题一贴，才能方便讨论！

各个区的发贴规范：

GMAT机经＋MATH讨论
http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=128922

GMAT语法区版规
http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=79830

GMAT逻辑区格式和搜索
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=74827

GMAT阅读区-发贴格式和搜索提示
http://forum.chasedream.com/dispbbs.asp?boardID=25&ID=41017

GMAT AWA区版规
http://forum.chasedream.com/dispbbs.asp?boardID=26&ID=107312

方便自己，方便他人，感谢您的理解和支持！