Hi!
1. Christine est une femme heureuse. (no "s" as it is a singular, and you had the "se" right, as it is a woman)
3. Elle habite dans un nouveau appartement ("appartement" is a masculine noun in French, so it should be "nouveau")
5. Elle a des bons chiens (meaning "she has good dogs")
7. Elle est intelligente et jolie (same as the first one, "she" is a singular so you do not need that "s")
8. Elle a une grande famille (I think the "une" is missing in the elements provided) ("a eu" would be in the past, but she has a big family now in the present, not in the past, so you should use "a")