1. Are you from China? - Yes, I am.
2. Is Lady Gaga your favorite singer? - No, she isn't (is not).
3. Are you and your friend football fans? - Yes, we are.
4. Is Rio de Janeiro in Brazil? - Yes, it is.
5. Is "The Hobbit" a good film? - Yes, it is.
6. Is Rafael Nadal a singer? - No, he isn't (is not).
7. Are computers expensive? - Yes, they are.
8. Is your name Stefani? - No, it isn't (is not).