2. Paragraphs ③ and ④; [The first paragraph leads to the topic, the second paragraph raises the question, and the third paragraph analyzes the question]
3, citing arguments (or reasoning, reasoning); Positive and negative [quoting Mr. Gu Gu's words enhances persuasiveness, and citing argument is a reason argument; In paragraph (4), say what you advocate first, and then say what you object to, so it is right first and then against]
4.b [A focuses on decisiveness, C focuses on consideration, and D focuses on courage. Judging from the author's denial of Xiong Zan's migratory birds and his final statement "Make up your mind to drink to yourself", you should focus on making up your mind and actively looking for opportunities for change.
If you feel good, please give the best! Typing is not easy, and thinking is not easy!