题目内容：

there is a library in front of the classroom .（改为一般疑问句并作否定回答）

优质解答

Is there a library in front of the classroom?
No,there isn't.

追问：

there are seven days in a week . （改为一般疑问句，并作肯定回答） 写完采纳

追答：

Are there seven days in a week? Yes, there are.