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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
看到D选项才想起来each year 和annually是同一个意思重复了，排除ABC，D，并不是不平行，平行的话，两个主体平行就可以，主体的修饰语不平行ok的。D的意思表示在员工疾病预防里（in）/方面。E表示通过预防疾病的方式。意思不一样。类似语法之光里的一道题。
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