1.That red car is my sister's.
__These__red_cars___ _are___ _our___siter's.
2.Who is that woman?
Who__are _those__ _women___?
3.This is a pencil-box.
__These__ _are_ _pencil-boxes___.
4.He is an English child.
_They___ __are__ _English___ _children___.
5.There is a bus on the stop.
There__are__there___buses_on the bus stop.
6.Is this your bike Yes,it is.
__Are__ __these__ your_bikes___?Yes,__they__are