根据短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。

Someone says, "Time is money." But I think time is 小题1: important than money. Why? Because when money is spent, we can get it back. floweret, when time is 小题2: it’ll never 小题3: . That’s 小题4: we mustn’t waste time.

It goes without saying that the 小题5:is usually limited (有限的). Even a second is very important. We should make full use of our time to do 小题6: useful.

But it is a pity that there are a lot of people who do not know the 小题7: of time. They spent their limited time smoking, drinking and 小题8:. They do not know that wasting time means wasting part of their own小题9:. In a word, we should save time. We shouldn’t   小题10: today’s work for tomorrow. Remember we have no time to waste.

结合教育史，论述古代教育的阶级性。