(2016·湖南常德市高三3月模拟考试)Imagine life as a game in which you are playing some five balls in the air.You name __1__(they)—work，family，health，friends and spirit，and you’re keeping all these balls in the air.
You understand that work is a rubber ball.If you drop it，it will bounce back.But the other four balls are made of glass.If you drop one of them，it will be scuffed(磨损)，damaged or even broken into __2__(piece)．They will never be the same.You must understand the balance in your life.How?
