根据短文内容，选择恰当的词，填上横线上。
having, playing, reading, Saturday, under, fruits, near, fine, happy, students
It’s ______ today. It’s ______. The ________ and their teacher are ________ a picnic. They are sitting ________ the river. Some are ________ games. Some are eating ________. Some are singing and dancing. Who’s _______ books ________ the tree? Oh, that’s John. How ________ they are!