6．
Answer the questions(根据以下内容，回答问题)
I am a little fish. I live in a small river. It's dark there,
but I am not afraid. There are many fish living near me, and I have a lot of
friends. We often play games together. I feel happy that I am a fish because I
love swimming. My mother often tells me something about the sea. I hope I can
swim to the sea one day. My mother is very worried about me. She often wants me
to be careful. I know she is right. Mother loves me and I love her, too. These
days the water of the river is getting dirty. People often throw litter into
the river. We have to move to clean water.
