根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Habits for a healthy lifestyleAs teenagers grow up, they become more independent andstart making their own decisions. However, during this period, it can be easyfor some of them to form bad habits, such as tobacco or alcohol abuse. Toprevent harmful habits like these from dominating teenagers, life isessential. .We are what we repeatedly do. In many ways, our lifestyleis the sum of choices we have made. According to modem psychology, we must firstlearn about the habit cyc