题目内容：

英语选择题 There are students playing on the playground now they are all studying in the classroom
A many Bsome C any D no 加 解释

优质解答

要填的是在there are 后面吧,应该选D,句意：现在没有学生在操场上玩,他们全都在教室里学习.根据后面学生们都在学习判断前面是说操场上没有人在玩,选no