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

答案及解析： B

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。