Используйте притяжательный падеж:
1.The sedan of her neohew is red.
2.The wheels of the bus are rotating.
3.The population of Yoshkar-Ola is not large.
4.Those are the bags of my children.
5.This is the flat of Tom and Jerry.

1) Her nephew's sedan is red2) Bus' wheels are rotating3) Yoshkar-Ola's population is not large4) Those are my chidren's bags5) This is Tom and Jerry's flat