Odpowiedź:
11.
1 look for bargains / complain about services
2 cost a lot / go off (zepsuć się)
3 match / fit
4 give changes / give receipts
5 advertise their products / have special offers
12.
1 in
2 on
3 to
4 to
5 at
Wyjaśnienie:
powodzenia <3