Make the sentence Подготовила Мартынова С. А.
He has invited this device for two years.
The dishes had been washed up by Masha.
Dinner had been cooked by my mother.
The teeth had been brushed.
I think that the laser had not been invented yet.
Invitations have been sent to all the old pupils.
This man has never been spoken of.
The letter has just been typed.
He has been told everything.
The door has been left open.
This mountain has never been climbed before.