It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system t

题目简介

It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system t

题目详情

It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
A.caused, realizedB.had caused, realized
C.caused, had realizedD.was causing, had realized
题型:单选题难度:中档来源:不详

答案

B
考查时态。not until引导的状语从句,从句用过去完成时,主句用一般过去时,故选B。

更多内容推荐