完形填空，阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。

　　I was now five, and still I showed no much interest in things except with my toes(脚趾)．I could not look after myself, 　　1　　 my father took care of me．I used to lie on my back all the time in the kitchen．I was 　　2　　 , imprisoned(监禁)in a world of my own, unable to communicate with others．

　　Then, suddenly, it happened on the afternoon of a cold December day．All the family were gathered round the big kitchen fire．Mona and Paddy were drawing funny animals, using a bright piece of yellow chalk．It was the chalk that 　　3　　 me so much．I had never seen anything like it before．

　　Suddenly, I wanted to do what my sister was doing．Then without thinking or knowing exactly what I was doing, I 　　4　　 out and took the chalk out of my sister's hand, with my left foot．It is a puzzle(迷惑)to many people as well as to 　　5　　．I held the chalk tightly between my toes and made a wild scribble(乱涂)with it on the board．Next moment I stopped, not knowing what to do with the chalk next, hardly knowing how it 　　6　　 there．Then I looked up and realized that everyone was looking at me 　　7　　．My mother came in．Her eyes looked from my face down to my 　　8　　 , then she took another piece of chalk from Mona, and drew the single letter “A” on the floor in front of me．“Copy that, Christy．” She said．I tried to do the same action, but I 　　9　　．“Try again, Chris．” she whispered in my ear．I tried another two more times．I drew one side of the letter, then the other．It looked ugly, but I 　　10　　 to make it finally．I had done it! True! I couldn't speak with my mouth, but now I would speak through something more 　　11　　 than spoken words．That one letter was my 　　12　　 to a new world, my key to mental freedom．

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　　Chess must be one of the oldest games in the world．An Arab traveler in the year 900 wrote that it was played“long long ago”．Chess was probably invented in India, and it has been played everywhere from Japan to Europe since 1400．The name“chess”is interesting．When one player is attacking the other's king, he says, in English,“chess”．When the king has been caught and cannot move anywhere, he says“check mate(将死)”．These words come from Persian(波斯语)．It means“the king is dead”．That is when the game is over, and one player has won．

　　Such an old game changes very slowly．The rules have not always been the same as they are now．For example, at one time the queen could only move one square(方块) at a time．Now she is the strongest piece on the board．It would be interesting to know why this has happened!Chess takes time and thought, but it is a game for all kinds of people．You don't have to be a winner in order to enjoy it．It is not always played by two people sitting at the same table．The first time the Americans beat the Russians was in a match played by radio．Some people are able to play many people at the same time．One man played 400 games!It is said that some people play chess by post．This must make chess the slowest game in the world．

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