What topics are more suitable to talk about in class?

1, people often try to change in their lives, in order to make life closer to their goals. "Most people want to change the world, but few people want to transform themselves." Please give a speech on this topic.

2. Dante said: Go your own way and let others talk. But in reality, there are also many times when we need to listen to other people's opinions with an open mind. Please tell me your opinion.

3. Some people think that youth is like a mountain, bearing all the sadness; Jing M.Guo once said: Youth is a beautiful sadness. What is youth in your eyes? Please be specific about your views on "youth".

When the first ray of sunshine in the morning shines on the prairie in Africa, the antelope will say to itself: Run! Or you will be eaten by a lion! The lion will say to himself: Run! Or you will starve to death here! Please make a three-minute speech with this short story.

5. Explain how you understand this sentence: "Free is the most expensive thing in the world"?