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1.Everyone should know ( )to save themselves when a fire bre

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1.Everyone should know ( )to save themselves when a fire breaks out.A.whether B.what C.when D.how
2.If I find his phone number,I( )you.A.tell B.told C.will tell D.have told
how 怎么救自己而不是是否救 什么救 什么时候救
will tell if条件句 自己看看语法书 第一种条件 表现在假设 后加将来时
ifI were you , iwould do
if he had , I would have
最简单的3种形式
if sth is sth , sth will xxxx