Hello, I'm Billy. One day when I went by the park, three girls Mary, Susan and Molly (walk) in the park. I wanted to play with them but I was afraid to speak to them, so I hid (藏) behind a tree and watched them. While I (watch) them, suddenly a cat ran down the tree. The three girls were shocked (惊愕的). After a while they calmed down (平静下来). Then they (begin) to talk about their dreams. Mary said, "I (become) a famous musician when I grow up." While Mary (talk) about her dream, something else happened. A small boy ran to them. While he (run), he fell down. Mary stopped talking. All of us (go) to help the boy. He was hurt badly. When we (discuss) which hospital we would take him to, the boy's mother arrived. Without saying anything, she (call) 120 for help. While all of us (wait) for help, another accident happened.
