第一个没有唯一答案
只要是任何的名词,吃的,喝的,都行,这是营业员对你说的
比如,你要什么（apples,oranges,meat)之类的,你说你要的
第二个,be careful(系表结构）
小心一点,不要在马路上踢球
fire safty
it is well known that fire is useful for us,but fire is sometimes dangerous for people.so we students must take some actions to prevent fire from being harmful .