Ever since the financial crisis ________, many workers _______from their jobs.A.broke out; were laid offB.has broken out; were laid offC.had broken out; had been laid offD.broke out; have been laid off
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D解析这题考查时态的用法,因为是since引导的时间状语从句，所以第一空填过去时，主句用现在完成时。句意是：自从经济危机爆发，很多工人被解雇了。选D。