Are the keys yours?－No, they aren’t _____. I think they’re Jason’s.

Did you go to Kunming on vacation? — No, but it’s a good place _____ I often dream of going.

_______have you been away from your hometown，Janet?－Since 5 years ago.[ ]

Excuse me, can I have this seat, please?–I’m sorry, but it’s_______.

Only by studying hard ________ improve her English soon.