My uncle fixes his car at the (a)   shop.

My mother sends a package at the (a)   office.

I buy some socks at the (a)   store.

I see the cats at the (a)   store.

I have to greet my grandmother at the train (a)   .

I need to deliver a paper to my professor at the (a)   .

I have to return my room key to the (a)   .