Переделайте предложения,образуя формы множественного числа. There is a big fir-tree in the park. There is a good movie

1. There are big fir-trees in the park.

2. There are good movies on TV today.

3. There are not free seats in the hall.

4. There are trains at 10:30.

5. There are many parks in London.

6. There are many classrooms in our school.

7. There are not good students in our lecture room.