A、To keep fit. B、To study well. C、To earn more money. D、To gain self-esteem. A短文开头提到，新年伊始是制订塑身计划的好时候，努力做一个身材匀称、健康快乐的人。

As a new year begins, it’s the perfect time to set goals for a healthier body.(16)You’ve made a promise to yourself again to get into shape, shed some weight and be a healthier, happier person. While most of these undertakings take time, energy and planning, there are quick changes that you can make today that can improve your well-being and put you in the driver’s seat on the journey to a new and improved self. Here are some helpful tips to get you there. First, find what motivates you. Self-reflection is as important as your reflection in the mirror. Look inward to understand why you’re setting goals. Is it for better health or improved self-esteem?(17)Write down your goals and read them often. Hang them on your refrigerator as a warning to aimless eating. Second, quantify it. Reaching your goals means making sure you measure up. Many find success if they hold themselves accountable by keeping a journal that reflects minutes of exercise, food portions and choices. Third, keep it real.(18)Setting realistic goals will keep you motivated. Unsustainable exercise or total self-deprivation of your favorite foods only frustrates your incentive and sets you up for failure. Make small and reasonable changes for big results. A new year can mean a new self—inside and out. This time of year is about learning from the past, and applying those lessons learned to the year ahead. If you want to get healthy and see results, something has to be changed. But it’s important to recognize that with changes come setbacks.
16. What is the New Year’s resolution in the passage?
17. How can people achieve their goals?
18. What should people do to stuck to their goals?