nouns: compunds and possessive forms

Please remember to put the BOWL OF CEREAL in the dishwasher after breakfast.

Right or wrong? We went to my GRANDMA'S last night

We're going to spend two weeks at my parents cabin in the mountains.

Right or wrong? She's a LANGUAGE TEACHER at a high school.

Right or wrong? What happened at the STORY'S END?

Right or wrong? Amir is the SON OF THE NEIGHBOR you met yesterday

Right or wrong? Matt put his sunglasses in THE HANDBAG OF HIS GIRLFRIEND.

Right or wrong? My mom is hopeless at buying CLOTHES OF MEN.

The supermarket has stopped giving away free BAGS OF PLASTIC.

Right or wrong? I opened the FRONT DOOR because I thought I'd heard the doorbell ring.