One day, a teacher was speaking to a group of students about how to 　　1　　 their time．He gave an example those students would never forget．

　　He pulled out a wide jar(罐子)and put it on the table．He also took out several rocks and carefully put them into the jar one at a time．When no more rocks would 　　2　　 inside, he asked,“Is this jar full?”

　　Everyone in the class shouted,“Yes．”The teacher replied,“Really?”He pulled out a box of small stones．He dumped some in and 　　3　　 the jar．The stones went down into the spaces 　　4　　 the big rocks．He then asked the group once more,“Is this jar full?”

　　“Probably not,”one of them answered．“Good!”he replied．He brought out a glass of sand and dumped the sand into the jar and it went into all of the spaces 　　5　　．Once more he asked the question,“Is this jar full?”

　　^aNo!“the class started．Once again he said,”Good!“Then he poured a cup of water in 　　6　　 the jar was full．Then he asked,”What is the key point here?“One student put up his hand and said,”The key point here is that even if you are busy, you c－　　7　　 plan everything well if you try really hard!

　　“No,”the speaker replied,“that's not the point．The point is if you don't put the big rocks in 　　8　　, you'll never get them in．What are the 'big rocks' in your 　　9　　?Time with your loved ones, your education, or your dreams?Remember to put these big rocks in first, or you'll never get them in 　　10　　．”

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