Нужно составить 3 предложения на языке со словом there

There are five pupils and a teacher in the classroom
There is a teacher and five pupils in the classroom
There was a book here, but I don't see it.

There is one chair in the room. - В комнате (есть) один стул. 
There are some chairs in the room. - В комнате (есть) несколько стульев.