Jane got up early last Saturday. She wanted (41) in Green Park. (42) she was ready, she got on her bike to the park. On her way, she (43) sirens (警笛), and the sound was getting (44) As she looked (45) to see what was happening, Sherry fell off her bike. Luckily, she wasn’t hurt, (46) a car hit her bike. After the car (47) , two men got out and started running. (48) , a police car came and three policemen got out, running after the two men. They shouted, "Stop the thieves (贼)!" (49) a policeman came to thank Sherry because, in a way, she had helped them (50) .