That was a man-made disaster that clearly______if the federal government, specifically the Federal Emergency Management Agency,

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问题 That was a man-made disaster that clearly______if the federal government, specifically the Federal Emergency Management Agency, had quickly marshaled the political resources to evacuate those without access to cars, instead of promoting on its Web site a faith-based charity that was clearly no match for the problem.

选项 A、could have been averted
B、should have just averted
C、would have not really averted
D、could have not averted

答案A

解析 本题中的从句是虚拟条件句,从句的谓语是用过去完成时(had+过去分词),这时主句谓语应用“should(would,could,might)+have+过去分词”。从句主要是说如果联邦政府迅速地疏散那些人,据此可推知主句应为人为的灾难就能够避免。空格处应为肯定、被动语态形式,因此A项正确。
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