排列对话顺序
（    ）A How are you?
（    ）B I’m fine. Thank you, and you?
（    ）C Go home now, David.
（    ）D Fine, thank you. And you?
（    ）E Good afternoon, David.
（    ）F OK. See you, Mr Green.
（    ）G I’m fine, too. Thank you.
（    ）H See you.