How the big forest fire has ________ remains to be a mystery.
A. broken up B. broken out C. taken place D. turned up
How the big forest fire has ________ remains to be a mystery.
A. broken up B. broken out C. taken place D. turned up
B。句意为:这场森林大火是如何发生的,现在仍是个迷。take place常指按计划进行或在预料之中。