Choose the best topic from A to F according to the meaning of each paragraph

小题1:.Everyone has his own way of relaxing. Perhaps the most popular form is to take part in sports.. There are team sports, such as basketball and football. There are also individual(个人的) sports, such as swimming and running. Skating and mountain climbing are the most popular recreation for people who like to be outdoor.

小题2:When you are reading something in English, you may often come across a new word. What’s the best way to know it? You may look it up in the English-Chinese dictionary. It will tell you a lot about the word, The pronunciation, the part of speech, the Chinese meaning and also how to use this word.

小题3: Students in many countries are learning English. Some of these students are small children. Others are teenagers. Many are adults. Some learn it at school, others by themselves, a few learn English by listening to the language over the radio, on TV, or in films. One must work hard to learn another language.

数据库系统与文件系统的最重要区别是______。

A．数据共享

B．操作方便

C．数据结构化

D．无数据冗余