选择恰当的单词，补全对话。
A. am B. are C. Goodbye D. morning E. too
Xiaolong: Good morning, Xiaofeng.
Xiaofeng: Good 1．, Xiaolong.
Xiaolong: How are you, Xiaofeng?
Xiaofeng: I 2． fine, thank you. And how 3． you?
Xiaolong: I’m fine, 4．
Xiaofeng: Bye-bye, Xiaolong.
Xiaolong: 5．, Xiaofeng.
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