设偶函数f(x)满足$f\left(x\right)=2^x-4\left(x\ge 0\right)$，则{x|f(x-2)<0}=     (  )          

    Motto is a short statement giving a rule on how to behave , ____ can inspire us especially when we are ____ (face) with difficulties. Many of us have our mottoes, such as “Where there is a will, there is a way.” Or “Nothing is difficult if you put your heart into it.”, and so on. My motto is “God helps those who help____.” Sometimes I am lazy and don't want to make efforts ____ (work) hard, ____ the moment I think of my motto I will get energetic again and devote myself ____ what I am doing. I write my motto ____ I can see it easily. Every time I fail in my exam and begin to lose heart, the sight of my motto inspires me with much ____ (confident). My motto also makes me become ____ independent person. That is to say, I won't rely on others easily.

    My friends, what is your motto? It is really ____ (benefit) to you. So please choose one as soon as possible.

—I want to buy the book Harry Potter. Do you know its ________?

—Not quite sure. Maybe 30 yuan.