Помогите с местоимениями и словосочетаниями

1) This is Alice’s brother. I often see (her brother).
2) Mike and Polly are seven. Do you like (the children)?
Do you like (the children’s) pets?
3) We, John and Mary, understand you. But do you
understand (John and Mary)?
4) Give Kate some salad. (Kate) is hungry. Give (Kate) some
juice too..
5) Polly dear, smile, please. Look at (your mum),dear.