It was Children's Day yesterday, we 1the park. Our teacher was 2us.

    3 many people there. Some Young Pioneers (少先队员)4 near the river.

    5 sang and danced. There were some6 on the river. There was a hill

    7. Some boys8 in the river. We sat under 9 apple tree with our teacher. We 10on Children's Day yesterday.

____是人与人之间、人与群体之间思想与感情的传递和反馈的过程，以求思想达成一致和感情的通畅。