El pasivo impersonal no tiene un sujeto propiamente dicho, se introduce un sujeto "artificial". Transforme estas frases utilizando este pasivo impersonal.

They write it down. = > It is written down.

Transforme estas frases utilizando como sujeto it.
check or answer
they say
they expected
they propose
they had thought
they have hoped
they will be reporting
they said
they will know
they are informing
they tell