What do i need to do if my adjectif ends in -e and i want to set it in feminin or feminin pluriel ?

How to reply to bonjour who ever says it first gets a

Marion went on a trip to france and sent a postcard to her aunt brigitte describing the places that she has visited. what place did marion not go to? the beach the city the mountain the countryside

Fill in the blank with the right form of aller: ils aux magasins.