a) This problem is your (seu) not mine (meu).
b) My shoes are here. Where are his? (dele)
c) He forgot his dictionary, so she is going to lend hers (dela)
d) The word is ours (nosso)
e) Donald is riding his bike and Rebecca is riding hers (dela)
f) Is that car still theirs? (deles)
g) A neighbor of our is a dentist. (nosso)
h) Who's here? - A friend of mine (minha)