军考英语：重点词组例句：set fire to

　　The chairman finally ended up his speech.主席终于结束了演说。

　　warn sb. of 警告某人

　　He had decided to warn her of the mistake she was making. 他决定告诫她，她正在犯错误。

　　set fire to 放火… 

　　They set fire to the city. 他们放火烧了这座城市。

　　put out 扑灭;关掉

　　Please put the light out when you leave the room.离开房间时请把灯关掉。