You should study for your exams to get a good grade.We should organize a meeting to discuss the project.They should apologize for their rude behavior.He should quit smoking for the sake of his health.I should clean the house before guests arrive.You should follow the rules to avoid getting in trouble.We should leave early to avoid traffic.They should report the incident to the authorities.She should ask for help if she doesn't understand the task.I should call my parents to let them know I arrived safely.