Make sentences as in the example.

This is a camera.-Это камера.
These are books.-Это книги.
These are helmets.-Это шлемы.
These are stamps.-Это марки.
This is a guitar.-Это гитара.
This is a cap.-Это кепка.
This is a doll.-Это кукла.
This is a mug.-Это кружка.
These are coins.-Это монеты.
These are trainers.-Это кроссовки.