阅读短文，判断正误。

It is Sunday today. It is sunny and warm. Amy, Betty and Adel are in a park. There is a river in the park. It's not big but very clean. You can see some ducks swimming on the river. They are Mother Duck and four ducklings. There is a mountain in the park, too. The mountain is big. The trees are green and the flowers are beautiful. You can see red, pink, purple and yellow flowers. Amy and her friends are on the grass now. The grass is green and soft. There are many people on the grass. Look! Amy is riding a bicycle. She likes riding a bicycle. Betty and Adel are playing with a little dog. They like dogs very much. The dog is happy and the girls are happy, too!