Here are the completed sentences that maintain the same meaning as the originals:

1. Does your school have five hundred pupils?
2. She has long hair.
3. Nam's classroom is in front of the garden.
4. Are there twenty-five students in your class?
5. That is a small classroom.
6. John is the son of Mr. and Mrs. Black.
7. The children are going to school now.
8. She likes apple juice as her favorite drink.