Tick bites（蜱虫叮咬）are reported in 12 provinces and claimed 31 lives since 2007.
A. to break out
B. to have broken out
C. to be broken out
D. to have been broken out
网友回答
A. to break out
(答案→)B. to have broken out
C. to be broken out
D. to have been broken out
解析：考查非谓语动词。break out爆发，不及物，故不用被动。根据语境事情已经发生，故用完成时，选B。