选词填空，用所选单词的适当形式填空

money ,    return ,  more ,  useful,  why,  play,  lose ,  time ,  life ,  leave , with,     game

 
Someone says, "Time is money. " But I think time is important than money.  Why? Because when   is spent we can get it back. However, when time is gone, it'll never__, That is __ we mustn't waste time.
So we say that __ is usually limited (有限的).  Even a second is very important. We should make full use of our time to do something __.
But it is a pity that there are a lot of people, who do not know the importance of time. They spent their limited time smoking, drinking and __, They do not know that wasting time means wasting part of their own ____.
In a word, we should save time. We shouldn't  _ today's work for tomorrow. Remember we have no time to __.