根据短文内容，将方框里A—E五个句子分别填入文中空缺处，使内容完整、正确。
Dongdong lives in the countryside with his grandparents. He likes swimming there very much. There are many trees on the banks. The air is fresh and clean.
Dongdong’s parents work in a big city. They will take him to the city. Dongdong wants to live with his grandparents. because there are no grandparents,no rivers or birds in the city. 

A. They miss Dongdong very much. B. They can hear many birds singing in the trees. C. There is a river (小河) in front of their house. D. He doesn’t like living in the city at all. E. Dongdong likes living in the countryside.