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
D

這題考查時態(tài)的用法,因為是since引導(dǎo)的時間狀語從句，所以第一空填過去時，主句用現(xiàn)在完成時。句意是：自從經(jīng)濟危機爆發(fā)，很多工人被解雇了。選D。
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