“西气东输”工程不经过的区域是(　　)

    Everyone wants to relax after working or studying for a long time.____. Let me tell you some of my favorites.

    ____,so the usual way I relax is to watch or play many kinds of sports. My favorite is tennis, but I am interested in all kinds of sports. Whether I am playing tennis or watching a game on TV, it is exciting to see team members doing their best.____ It's true that playing sports is not physically(身体上的) "relaxing", but I find it really cool, and a good way of "relaxing" my brain after a day's hard work.

    I enjoy listening to music, and I always have some music playing during my free time. I listen to all types, but I enjoy listening to beautiful piano music. Some people can't study while listening to music, but for me,____.

    Some people choose to relax by traveling. I don't have a favorite place, but I hear that traveling in Japan is really enjoyable. When I travel to other places____.

阅读短文，把A-E五个句子填入文中空缺处，使短文内容完整。

A. It's amazing to see players playing very well

B. I have many ways of relaxing myself

C. I enjoy sightseeing and seeing how the culture and people change from place to place

D. I am a big sports fan

E. I believe I can study better by listening to light songs.

下面两幅图片是某同学在研究性学习中搜集的资料。他研究的课题是（    ）