根据下面的对话情景,在每个空白处填上一个适当的句子,使对话的意思连贯、完整。
A:, Grace!
B: Good morning, Jack!
A:?
B: I'm fine, thanks.?
A: I'm OK.
B: Jack, this is my new friend, Linda. Linda, this is Jack.
A:, Linda.
C: Nice to meet you, too, Jack.
A: Where are you from, Linda?
C: I'm from Shanghai.
A: Oh, welcome(欢迎) to Beijing.
C: .