It was Saturday. Chen Jie and her mother exchanged roles(交换角色). She did her mother's work and her mother did Chen Jie's work instead.

Chen Jie got up at six o'clock in the morning. She cooked breakfast. Her mother read books and did homework in the study. Chen Jie wanted to watch TV, but the house was in a mess(不整洁). She cleaned every room in the house. Then she washed clothes. At last, she sat on the sofa. She was very tired. She said to her mother, "Mum, I'm so tired. It's not easy to be a hard-working mum. " Her mother said, "It's also not easy to be a hard-working student. " They understood (理解) each other more than before.