ADJ

matching
a matching pair of vases
identical

PREP

in a/the ~
Answer one question in each pair
in ~s
These candlesticks only come in pairs
~ of
a pair of shoes

PHRASES

one of a pair
one of a pair of crystal vases

ADJ

inseparable
good
happy (= a newly married couple)
odd
They make an odd pair

VERB + PAIR

match
The pair were matched for age
make
I thought they would make a good pair so I arranged for them to meet

PREP

in a/the ~
The students worked in pairs

ADJ

breeding

PAIR + VERB

breed, mate

PREP

~ of
a pair of swans nesting by the river