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题库 / GMATAdvanced-SC-6
Indoor air pollution can threaten the health of closely confined farm animals and the workers who tend them and perhaps as well impairs the quality of such farm products like eggs, poultry, and pork.
perhaps as well impairs the quality of such farm products like
perhaps as well impairs the quality of such farm products as
perhaps also impairs the quality of such farm products like
may also impair the quality of such farm products like
may also impair the quality of such farm products as
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like只用于 像不用于列举所以 ABD排除 然后第一个里面是can threaten 所以后面的impair也要用原形
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