This is...
a pair of cups. / two cups.
This is...
a pair of socks.
This is like a very long jacket which you can wear outside when it's raining.
A raincoat.
A pink monster is playing football.
Yes.
There are two boys riding bikes.
No.
Two boys in white shirts are playing soccer.
No.
A girl can wear this when she wants to go swimming.
Swimsuit.
A pair of these can help some people to read a book.
Glasses.
You can wear this round your neck in cold weather.
A scarf.
One boy and one girl are skating.
No.
The old man has got white beard.
Yes.
Those are...
five pairs of glasses.
You can wear these on your feet inside your shoes.
Socks.
This is...
pair of shoes.