请根据语篇内容，用方框中所给词的正确形式填空，使短文意思通顺、正确、连贯，并将答案写在题后的横线上。方框中有两个是多余项。

use, without, waste, invite, learn, except, do, many, careful, teacher, he, teenage

   Today is September 10th. It`s ___（1）____ Day. There was a party for our teachers in our school this morning. An old teacher with a lot of rich experience ____（2）____ to give us a talk about his life. He said, “Education is a (an) ____（3）___ part of our development. As young ____（4）__, it is our duty to try our best to deal with each problem in our education with the help of teachers. People won`t become clever ____（5）___ it. ” He told us that he had completed ____（6）__ than forty years of teaching. He also showed ____（7）____ thanks for the people to care for teachers.I ___（8）__ a lot from him so far. I decide to work ___（9）__ at our lessons in order to serve the people better in the future. And I ___（10）__ my best to build our country into a beautiful, strong and rich country.