At 11 o’ clock on a bright sunny morning, Mary rode a bike to a Nature Park. Because she wanted to find a place to relax. Ten minutes later, she saw two boys swimming in the lake, so she stopped walking and looked at them happily. But she didn’t know a boy was behind her. He was a thief and he wanted to steal Mary’s bike. When Mary was looking at two boys playing with the water, the thief rode her bike away. How time flew ，Mary was hungry and she wanted to go home for lunch. But she couldn’t find her bike. She was very worried and cried sadly. She called the police and she hoped the police could find her bike!
