2. 解析：选B。try to persuade sb.意为“试图说服某人，结果他就是不听”；manage to persuade意为“成功说服了”。根据句意，选B。

5. fully appreciate

提升练习

4. closely connected

3. Obviously; deliberately　

2. in the best possible way

4. causing　　 5. preparing

3. be relied

5. responsibility

4. endangering

3. illegal