can and could 2

1. You      park here. It's forbidden.    

2. Sam      go to the party because he is too busy.

3. He hasn't got a racket, so he    play tennis.

4.    you ride a bike when you were seven?

5. Pamela is a ballerina, so she      dance very well.

6. They      see the lunar eclipse yesterday.

7. If my sister were younger, she      learn English.

8. I looked everywhere but I      find my keys.

9.    dinosaurs fly?.

10. If you are hungry, you eat a banana.