This is my friend's dog ...
that/which
Ramon is the man .... wallet
whose
Ruben is a boy. Ruben lost his computer.
Ruben is the boy whose computer got lost.
This is the woman ...
who/that
Amelia is the teacher ...
who/that ...
I am the only one of my friends ...
who/that
My mom is the person ...
who/that
That is the park ...
where
This is the cat ...
that/which
Margaret is my friend ...
who/that
This is Adriana ... pencil
whose
Sarah is the girl...
who/that
This is the cellphone ...
that/which
Juan is my uncle. Juan lives in Panama.
Juan is my uncle who/that lives in Panama.
That is the sofa ...
that/which
These are the students ...
who/that
This is the beach ...
where
My dad is the one ...
who/that
This is the giraffe ...
that/ which ....