问题
选择题
Ever since the financial crisis ________, many workers _______from their jobs.
A．broke out; were laid off
B．has broken out; were laid off
C．had broken out; had been laid off
D．broke out; have been laid off
答案
答案：D
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。