English in Mind, page 30, ex-es a, b, a, b
Possessive Adjectives page 31 exercises

2. Michelle Obama’s mother lives in the White House.
3. Marian is Malia and Sasha’s grandmother.
4. Micelle’s daughters are Malia and Sasha.
5. Malia is Sasha’s sister.

Emily’s house.
Me. Black’s car.
My fathers computer.
My sister’s bice.
My brother’s school.