阅读短文，选择正确答案。 Peter, Ann, Mary and their parents go to the countryside for their summer holiday. That is a beautiful place. They live in a farmer's house. The farmer is Mr Black.
In the morning, they go for a walk in a forest. They see a river. The father wants to swim in it. So he jumps into the river. After some time, he comes out. He says there are a lot of fish in it.
In the afternoon, Peter and Mary go fishing by the river. Two hours later they catch ten fish. In the evening, Ann cooks the fish and some other delicious food for dinner. They eat a lot. They are very happy.
