The passive voice is used to show interest in the person or object that experiences an action rather than the person or object that performs the action.
The cat eats the mouse. (we are interested in the cat).
The mouse is eaten by the cat. (we are interested in the mouse)
Passive => be + past participle
be is conjugated
training with past participe (very easy)
a little harder
in question 14, there is a mistake: which one?