Adjective or Adverb?

Is the underlined word an adjective or an adverb?

1. Pete played some exciting games.

2. Ben sat quietly in the living room.

3. The trip to London was great.

4. Ben made the sandwiches nicely.

5. They watched the film happily.

6. He can buy me a cheap bike.

7. She writes stories fantastically.

8. The scratch was long.

9. Ben worked hard in the garden.

10. He took the invitation to Ben quickly.