单选题 The children and their parents had great fun_______games in the park.
【正确答案】 A
【答案解析】本题考查固定用法。句意:孩子们和他们的父母在公园里做游戏,他们玩得很开心。have(great)fun doing sth.为固定用法,意为“做某事有乐趣,做某事很开心”,相当于have a good time doing sth.。故本题选A。