孩子们正在打篮球 the children are playing basketball.为什么用 playing

孩子们正在打篮球 the children are playing basketball.为什么用 playing The children are playing games. The children are playing happily. 打篮球有趣吗?( )playing basketball( ) 完成句子The children are playing basketball in the playground __ The boys are playing basketball there. The boys are playing basketball instead of___volleyball Look,how happily the boys are playing basketball .为什么要用happi 二、 按要求完成下列各句.（10分） 1. The children are playing basketball . The children are playing in the park Look!There are a lot of children playing in the ground.为什么要用 The children are playing football now.