Last Sunday, Bob had a {#blank#}1{#/blank#}（特别的）experience because he met an {#blank#}2{#/blank#}（事故）. On that day, all his classmates went hiking {#blank#}3{#/blank#}（除了）him, because he missed his grandmother very much. She was very old and lived {#blank#}4{#/blank#}（单独地）far away from the town. On the way there, {#blank#}5{#/blank#}（当……的时候）he was walking, a car came fast and hit an old man down. However, the driver didn't stop to help the poor old man. {#blank#}6{#/blank#}（代）, he went away. Bob felt so angry and afraid. He found {#blank#}7{#/blank#}（没人）there and he had to call the police. The police came right away and the old man was taken to hospital quickly. {#blank#}8{#/blank#}（幸运地）, the old man was still alive. As a result, Bob got to his grandmother's home a bit late. After his grandmother {#blank#}9{#/blank#}（听到）this, she smiled and said he {#blank#}10{#/blank#}（是）really a good boy.