Hi there!!!
What's up?
Here below, you have got a brief but crucial explanation about demonstrative pronouns.
They are the following ones:
THIS
It is used with singular nouns to indicate something close to the speaker or something happening now.
THAT
It is used with singular nouns to indicate something further away in distance or time.
THESE
It is used with plural nouns to indicate something close to the speaker or something happening now.
THOSE
It is used with plural nouns to indicate something further away in distance or time.
Now, you've got two exercise to put in practice these demonstrative pronouns with some possessive ones.
Good luck!!!