Don't play _____ fire. [ ]
A. /
B. with
C. on
答案：B
While we were listening to the speech attentively, a voice ________ to announce the result of the election
A．broke in
B．broke down
C．broke up
D．broke off
猩红热的病原体是
A．B组卢溶血性链球菌B．A组β溶血性链球菌C．红毒素病毒D．猩红热病毒E．红疹病毒
