请用上面的句子完成下面的对话A.Now we're going home.B.I'm standing on the G

请用上面的句子完成下面的对话
A.Now we're going home.
B.I'm standing on the Great Wall of China and talking to you.
C.That's great,Gina.
D.Yes,I can.
E.Can you send me a postcard?
________________________________________________________
Gina:Hi,Mom.Can you hear me?
Mom:______ Where are you?
Gina:_______
Mom:Really?
Gina:We're on a school trip and we're having a good time.
Mom:______What are the others doing?
Gina:Well,Tony is taking photos and Wang Hai is buying some postcards...
Mom:_____
Gina:Sure.We enjoy the school trip a lot.____ Bye!
Mom:Bye,Gina