One day， a professor asked his students， “If you had only three days to live in this world， what would you do？”

Student A： I want to stay with my friends.

Student B： I want to go back to see my parents.

Student C： I will try my best to eat some delicious food.

Student D： Professor， I want to attend your lecture.

Hearing this， the professor was very moved. He thought that anyhow there was still a student who wanted to attend his lecture. Just at this moment， he wanted very much to know why the student liked his lecture. So the professor asked， “Can I know the reason？”

“Because when we are in your class， we feel that one day seems a year.” Answered student D.endprint