(2) reasons: ① failing to fulfill the obligation of compulsory education seriously; ② The ability of distinguishing right from wrong is not strong, the social experience is insufficient, and the ability of self-protection is lacking; 3 making friends carelessly, making bad friends; (4) lack of legal awareness, and doing things prohibited by law.
(3) Understand the truth: Be careful when making friends, make more beneficial friends, and don't make bad friends.
Analysis of test questions: (1) This question aims to examine students' understanding of friendship. In the inscription, Li's personality began to improve only after he made friends with Wang Jun, who is cheerful. Therefore, his understanding can be answered from the importance (function) of friendship according to the knowledge in the textbook.
(2) To answer this question, we should read the materials carefully, find the breakthrough point from the materials, and analyze the materials sentence by sentence: "playing games without class" shows that they have not seriously fulfilled their obligation to receive education; "Big Brother's generous support" and "under the repeated coercion of Big Brother" indicate that he is careless in making friends; "Participating in theft" shows that they have poor legal awareness. Learn to combine the key information in the material with the knowledge in the textbook.
(3) Truth is the experience and lessons gained from materials. You can answer from the principle of making friends.