If you have a younger brother or sister at home, you should feel this way. It is always difficult for you to guide them to do their homework, because it is a particularly simple exam, and they can always ask dozens of "why". Once my brother did a problem, and the problem was that if I wanted to have another brother or sister at home, my parents would discuss with you what you would say. My brother wrote everything about dressing up. All right, I'll call! Haha, that's funny, brother.