问题
选择题
Does everyone know what to do if a fire ______?
A．is broken up
B．breaks up
C．is broken out
D．breaks out
答案
答案：D
考查时态及语态.当主句为一般现在时态时,从句用一般现在时态.句子fire是爆发的主体,故用主动语态,选D.
搜题请搜索小程序“爱下问搜题”
Does everyone know what to do if a fire ______?
A．is broken up
B．breaks up
C．is broken out
D．breaks out
答案：D
考查时态及语态.当主句为一般现在时态时,从句用一般现在时态.句子fire是爆发的主体,故用主动语态,选D.