1. This school is old.

These schools are old.

2. There is a market near the factory

There are markets near the factory.

3. Is Lan's sister beautiful?

Are Lan's sisters beautiful ?

4. It's a small house.

They're small house.

5. Is your room big?

Are your rooms big ?

6. No, it isn't. It's new.

No, they aren't. They are new.

7. There is a tree behind the house.

There are trees behind the house.

8. He is our teacher.

They are our teachers.