【正文】
He could be laughing for the exciting result of the match. A: No, can’ t you see he’ s reading a storybook. He must be laughing for a funny story. Sample dialogue 4: A: Why do you think the strange creature is running after the man? B: It could be playing with the man for fun. A: No, can’ t you see it is very fierce? It must be hungry. Thank you for listening