根据短文内容，从下框的A一F选项中选出能概括每一段的主题的最佳选项。并将答案涂在答题纸上相应位置。选项中有一项为多余选项。
A. Be optimistic
B. Stay close to friends
C. Act as if you are happy
D. Make somebody happy
E. Exercise regularly
F. Be grateful
Happiness is a choice. To be happy at all times, you need to make happiness a habit and not just an act. I believe that the following points will show you how to stay happy no matter what happens.
【小题1】
Gratitude is a sign of appreciation and you ought to show appreciation for life. Always wake up every morning in acknowledgement that you have a list of things you should be thankful for, for example, I woke up this morning, I have food on my table, I have clothes to wear, I have a good paying job, the skies are beautiful and the atmosphere is great. By the time, I am sure that you will feel better already.
【小题2】
Unhappiness can result from stressing our bodies and minds. Scientists believe that 20 minutes of exercise can make you happy regardless of how sad you may be. Exercise raises your heart rate. As your heart begins to pound, certain hormones（荷尔蒙）are released which create a sense of total well being and you begin to feel well again, the mind stress is gone and everything is under control. Another thing you can do is to take a walk; this works for me all the time. When you take a walk, you are able to think over matters that are bothering you and e up with solutions to them.
【小题3】
“The best way to cheer yourself is to try to cheer somebody else up.” Said Mark Twain. When you sow happiness, you gain happiness. Mother Teresa knew this secret so well; she devoted her life to helping others even if it simply meant putting a smile on someone’s face. Here are two of her famous quotes: “A life not lived for others is not a life; let no one ever e to you without leaving better and happier.”
【小题4】
Change is inevitable（不可避免的）and no situation is permanent. Whenever you are feeling sad or depressed, always remember that it’s temporary and that tomorrow will be better, tough times don’t last but tough people do. Develop a positive attitude, and you will stay happy.
【小题5】
Smile always, even when you are feeling blue. When the body acts, emotions follow. A smile costs nothing but it creates much, it enriches those who receive it without making those who give poor. Learn to smile and act at all times, it won’t only make you happy, it will also win you happy friends.F
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(答案→)F
解析：本文主要讲述的是幸福与否是我们自己的选择，并提出了几个具体的建议。
【小题1】F 根据本段第二句Always wake up every morning in acknowledgement that you have a list of things you should be thankful for可知这一段建议我们要对一切有感激之情。故F项正确。
【小题2】E 根据本段第2句Scientists believe that 20 minutes of exercise can make you happy regardless of how sad you may be.可知本段讲述的是适当的锻炼能够让我们更为幸福开心。故E项正确。
【小题3】D 根据第一句“The best way to cheer yourself is to try to cheer somebody else up.” Said Mark Twain可知让自己开心最好的方法就是让别人更加开心起来，这才是让我们开心的最好的方法。
【小题4】A 根据本段主题句最后一句Develop a positive attitude, and you will stay happy.可知本段建议我们要一直保持积极乐观的心态，只有这样我们才可以幸福开心。
【小题5】C 根据本段第一行Smile always, even when you are feeling blue. When the body acts, emotions follow.可知即使我们心情不好，我们也要保持微笑，因为微笑可以让我们保持积极的心态。故C项正确。