地球上的生命经历了几十亿年的演变，人类在几百万年前已经诞生，人的寿命最长能活一百多年。这说明人的生命是（     ）
①短暂的      ②漫长的      ③有限的      ④宝贵的 

    I'm Sam. My hobby is playing chess（棋）—one of the greatest games in the world. My mom taught me how to play when I was 7. She beat (打败) me every time for the first year. But then on my eighth birthday, I won for the first time. I nearly always beat her from then on.

    It takes about a day to learn the rules (规则). But if you want to be good, you have to practice for years. You don't need much to play chess—just a chess set (棋具) and someone to play with.

    Chess sets can be quite cheap, or very expensive. Some people collect chess sets as a hobby, but some prefers playing.

    There is a chess club in our school, and we meet every week to play with each other. I'm the best player in the club, and the captain of the school chess team. This year we won the All English Schools' Championship (锦标赛), and I had to go up on stage (台子) in front of the whole school to accept the trophy (奖品).

    I'm saving up my money to buy a chess computer. It's very expensive, but very good for practice. In that way, I'll always have someone to play with. One day I will be the world chess champion (冠军).

阅读短文，下列问题

（C）

    I like sports. I have ten tennis balls, seven basketballs, four volleyballs and five soccer balls. I play tennis with my friends every day.

    I have five baseballs, five volleyballs, two soccer balls. I like ping-pong. It's easy for me. I often play ping-pong with my classmates. I also(也) have three ping-pong bats and some ping-pong balls.

    I don't have any(任何的) balls. I love sports, but I don't play them. I only watch them on TV.