根據中文提示，把對話中缺少的內容寫在線上。這些句子必須符合英語表達習慣。打句號的地方，用陳述句；打問號的地方，用疑問句。 

提示：李明打電話給David， 邀請他下星期日去博物館看展覽。

(L=LiMing； D=David)

L：Hello.This is LiMing speaking.May Is peak to David?

D：    51  What'sup， LiMing?

L：What are you going to do next Sunday?

D：Nothing much.Do you have any ideas?

L：    52  ?There'sa Russian oil painting exhibi ion there.

D：Good idea!      53        ？

L：Bus202 will take you there.

D：Good.     54    then?

L：Let's meet just at the gate of the museum.

D：          55       ？

L：Half past nine.

D：All right.See you then.

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