完形填空。 When I was young, I liked to play jokes on people I knew, especially on my parents and friends. One day my mother was 1 and I was playing with my younger brother Tony. Suddenly I ran to my mother and said, 'Tony fell from the open window!' She was very 2 and ran out of the kitchen. Then I said, 'Don't worry, I'm just 3 .'And my mother shouted at me, 'If you do it 4 , I'll hit you.' One day I went swimming with my 5 in the sea. I wanted to play a joke on them. In the beginning, I went swimming 6 , and I called out, 'Help!' All my friends came to help me, only to 7 that I was joking. But the next time I wasn't joking. I was so 8 that I swam in deep water. I tried my best to call my friends for help, but this time nobody came to help me. 9 ,They found I was telling the truth. They came and saved my life. They took me to the hospital. This is the best 10 in my life. From then on, I haven't joked on anyone. (     )1. A. writing (     )2. A. angry (     )3. A. smiling (     )4. A. now (     )5. A. friends (     )6. A. fast (     )7. A. find (     )8. A. careful (     )9. A. In the end (     )10. A. time B. sleeping B. worried B. saying B. then B. classmates B. slowly B. understand B. careless B. At first B. sport C. cooking C. sorry C. playing C. again C. brothers C. well C. say C. fast C. Since then C. lesson D. running D. excited D. joking D. once D. parents D. alone D. think D. slow D. At that time D. day