阅读短文，判断句子正误。

Luo Jun is from Shanghai. He's a clever boy. He likes PE. He can play basketball well. He often plays basketball on Saturdays. On Sundays，Luo Jun and his parents often go to see his grandparents. His grandparents live in a beautiful village. There are many trees and flowers in the village. There is a river，too. You can see many fish in the river. But you can't swim in the river. It's dangerous（危险的）！