Question

me ajudem por favor

Answer 1

a) We are all going to Mary's tonight.
b) I saw the Browns' house yesterday.
c) Ted's and John's fathers are American.
d) The car of my mother-in-law is very old. (aqui você não coloca nada)

3)
a) I said that I didn't feel well that day.

Espero ter ajudado :)