选择对话的正确内容:
-Lucy,thisisMrSmith,myuncle.
-Howdoyoudo,Lucy?-________
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A.Howdoyoudo,MrSmith?Goodmorning.
B.Howareyou,MrSmith?Nicetoseeyou.
C.Howdoyoudo,MrSmith?Nicetoseeyou.
D.Howareyou,MrSmith?Goodmorning.
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