1. There were books and exercise-books on the desk.
2. There are some interesting stories in this book/
3. There are 7 days in every week.
4. There are two semestres in a school year.
5. There are no students in the auditorium.
6. There were some mistakes in his test.
7. There is a lift in the house.
8. There will be a garden near the house.
9. Is there a school in the village? - No, there isn't.
10. There will be many new books in the library.