通读下面的对话,然后根据上下文补全对话
Gina：Hi,Mom,can you hear me?
Mon：16（ ）where are you
Gina：17（ ）
Mon：Really?
Gina：It’s beautiful here and we’having a good time
Mon：18（ ）What are tony and George doing
Gina：well,tony is taking photos and George is buying postcards.
Mon：19（ ）
Gina：Sure.we enjoy the trip a lot.
20.（ ）bye