There is a park near my home. People like to go to this park after work. Some of them go to the park every day. Look! This is Mr. King. He is sitting on a chair and watching the children. Some children are playing a game. Some boys are playing football. Lucy and Lily are standing under a big tree. They are talking about their favorite movies. There is a small river in the park. We can see some boats on the water. Some children are sitting in the boats with their parents. Listen! A girl is singing. It's really a nice park. I come here every day.

依次连接等腰梯形各边的中点得到的四边形是（   ）