1. The teacher organized the students to watch a soccer match. After the game, the teacher led a discussion with the topic: how to carry forward the spirit of soccer in learning. "If we apply it to studying," Xiaoming said, "the reason our exam scores are low is that the ball isn't passed well. Some people aren't conscious; when others pass the ball to them, after copying it, they won't pass it back."
2. I asked my mother-in-law: "If this medicine is expired, then it's expired. Why would you take it when you're not sick?" My mother-in-law earnestly said: "You young people just don't know how to live. This is called 'taking it doesn't hurt, throwing it away hurts!'"
3. Two pigeon enthusiasts met and happily started chatting: "I am cultivating a new breed, crossing pigeons with parrots." "Why crossbreed them?" "If a pigeon gets lost, it can find its own way."
4. In the park, two people were discussing how to consistently win at Mahjong.
A: "Grandson says, 'Know yourself and know your enemy, and you will win every battle.'"
B: "Your grandson is only a month old, and he already knows this?"