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题库 / Prep2007E1-SC-82
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 simply provided offices with cleaner air.
annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided
annually if they prevented employee illness and gain as much as $200 billion through worker performance improved by simply providing
annually in employee illness prevention and gain as much as $200 billion through worker performance improved by simply providing
in employee illness prevention and gain as much as $200 billion through improving performance of workers if they simply provided
by preventing illness among employees and gain as much as $200 billion through improved worker performance if they simply provided
根据annually语意重复排除A,B,C
剩余D,E，根据平行，排除D
note：
SC：抓句子的主谓宾，看动词的发生先后顺序，以及找动词和动名词的逻辑主语
→B,C选项中的providing找不到合适的逻辑主语，应该为被动形式
→improve performance发生if provide之后，现在分词表正在进行，过去分词表结果，所以应该为improved，排除A,D
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