Big mistake

 Last weekend, I was going to finish my assignment. I took time enough to do so. But I completly forgot it after my mother told me to wash the dishes!
 When I washed the last dish, I felt too fitfilment. So I made a mistake. I misunderstood that I finished all things I should to do. Then, my mother came home and told ''Do you finish your assignment?'' I said ''Yes! ....Oh? ....I forgot.''
 After that, I had to work on my assignment hard. In this experience, I learned that I should take notes about what to do.