本期難句分析：

　　1.Everyone should know where the nearest fire alarm box is located and where exits, fire escapes, and fire doors are.

　　結構：本句有三個謂語動詞，其中主句的謂語動詞為should know，其余兩個都是由where引導的并列賓語從句。本句可以拆分為：

　　1) Everyone should know.

　　2) Where the nearest fire alarm box