Помогите решить 1 задание

1)This is a pen.That is apencil.2)This is a book.3)Is this your pencil?-No,it isn't my pencil,it is my sister's pencil.4)I have a sister.My sister is a engineer.My sister's husband is a doctor.They have got two children.5)This is a girl.This girl is their daughter.Their daughter's name is Vera.6)That is a boy.That boy is her brother . Her brother's name is Nick.7) This is our flat .8) We have got a car. Our car is not very expensive but reliable.9) I have no a pet.10) My granny has got a headache. She has no idea what to do.11)I have a friend.His name is Mike. My friend is very good.12)It's a cat. It's a tail is long and bushy. It's Mike's cat.