Ответ:

Ex1.She-her

He-his

Ex3

1.Pencil

Is it you pencil?

Yes it is.

2.Atlas

Is it your atlas?

no it isn't.I think it's Kate's Atlas

3.Map

Whose map is it?

i dont no.It not mine

4.Is it your ruler?

no it isn't

whose ruler is it

its Masha's ruler