I believe the answer is " Tu piensas "
He (Which should be El, but anyway) visto is not correct, because you are talking about someone else. Yo Tengo is correct, because you are staying that you have seen.
Answer:
1. Americano/a
2. Español/a
3. Hondureño/a
4. Chileña/o
5. Venezolanos.
Explanation:
I don't know 6-9 because I think those require a word bank