Ответ: 1.
There was a book
on the shelf.
2. There was milk
in the glass.
3. There were children
in the park.
4. There were mice
in the box.
5. There was a mouse
under the bed.
6. There was а pen in the bag.
7. There were five
persons in the family.
8. There was a table
in my room.
9. There was an
orange on the table.
10. There were seven
boys in the classroom.