6．
根据短文内容及括号内所给的提示填空。
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.
