With the passive voice, the writer usually expresses fear of not being taken seriously; it is the voice of little boys wearing shoepolish mustaches and little girls clumping around in Mommy's high heels.
Now, you should know that this is a more informal way of using the passive voice and in some cases, you can't use " get" in a passive voice to replace " be" .
Your protagonists should be active protagonists, but there are several contexts that aren't even mentioned here that you can use the passive voice in, and I just used a preposition at the end of a sentence.
It may be surprising to see variations because when you learn to form the passive voice, you mostly practice using by-phrases to name the agent, that is, the doer of the action.
In part three, to achieve the band 7-9 range, you must present the examiner with complex grammar, meaning present perfect, past perfect, passive voice, conditionals, and more.