Помогите, пожалуйста, выбрать правильный ответ в скобках This car is ( their, theirs) It...

Помогите, пожалуйста, выбрать правильный ответ в скобках
This car is ( their, theirs)
It is Ann's dress. It's (her, his) dress
These shirts are (your, yours)
This is (our, ours) house. It's (our, ours)
This is John's bed. It's (his, her) bed
The white T-shirt is (my, mine)
Дополни предложения местоимениями:
(I)...sisters is ten years old
(They) ...car is red
(You)... bicycles are old
(She)... house is big
(He)... eyes are blue
(We)... dogs is white
(He)... mothers is a teac

This car is their car
It is Ann's drees. It's her dress.
These shirts are yours.
This is John's bed. It's his bed.
The white T-shirt is mine.

My sister is ten years old.
Their car is red.
Your bicycles are old.
Her house is big.
His eyes are blue.
Our dog is white (Our dogs are white)