问题
选择题
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
答案：B
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。