A proverb says：“Time is money.” But in my opinion time is even more precious than money.Why? Because when money is spent，we can earn it back.However，when time is gone，it will never return.This is the reason why we must value time.
　　It’s well known that the time we can use is limited.Therefore，even an hour is extremely precious.We should make full use of time to do useful things.As students，we must engage in our studies so as to serve our country in the future.
　　But it is a pity that there are a lot of people who do not know the importance of time.They spend their precious time smoking，drinking，chatting and playing computer games.They don’t realize that wasting time is equal to wasting their valuable lives.
　　In a word，we should form the good habit of saving time.Do not put off what can be done today until tomorrow.Time waits for no man.Boys and girls，let’s value the time and our wish will come true.
　　教师点评：作者围绕主题组织材料，突出了时间的价值。文章语句简练，通俗易懂。可以说这是一篇较成功的习作。