This:
This is my first day of work.
Harry Potter? Yeah, this is my favorite book!
These:
These candles smells better than other ones.
I enjoy working with these people.
That:
That boy is the smartest in the class.
I've read all books, but that one was the best!
Those:
Those buildings looks destroyed.
She wants you to eat those vegetables.
This:
This is my first day of work.
Harry Potter? Yeah, this is my favorite book!
These:
These candles smells better than other ones.
I enjoy working with these people.
That:
That boy is the smartest in the class.
I've read all books, but that one was the best!
Those:
Those buildings looks destroyed.
She wants you to eat those vegetables.