标题: GWD37-37 （一帖只提问一题） [打印本页] 作者: kevin1473 时间: 2010-1-8 12:23 标题: GWD37-37 （一帖只提问一题） Each year companies in the United States could save as much as $58 billion annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simly provided offices with cleaner air. A. annually by preventing illness amongemployees and gain as much as $200 billion through improvingperformance of workers if they simly provided B. annually if they prevented employee illness and gain as much as $200 billion through worker performance improved by simply providing C. annually in employee illness prevention and gain as much as $200 billion though worker performance improved by simply providing D. in employee illness prevention and gain as much as $200 billion through improving performance of workers if they simply provided E. by preventing illness among employees and gain as much as $200 billion through improved worker performance if they simply provided