根据短文内容和所给中文提示，写出短文空白处各单词的正确形式。每空限填一词。
US President Obama gave a TV speech to his country’s students on the day of school. He made it from a     (教室) in a high school. He told them to study as     (努力) as they could.
“NO matter(无论) what you want to do with your life, you will need an education, ” he said.
“This isn’t just important for your own life and your own future. It will   (决定) the future of this country.”
Obama also said that school is not always    (容易). The   (挑战) of life make school a difficult time.
“Maybe you can’t get your parents’     (帮助). Maybe someone     (要求) you to go something wrong. But there is no excuse for not doing your homework or for not   (尝试). Your attitude(态度) toward yourselves and your education is the  (最) important.”
Students   （摇动）hands with Obama at the end of the class.