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I would like to obtain about some informations(information是不可数名词) about the historical exhibition in you(用your) city. Therefore，I would like to extend my greatest appreciation if you are so kind as to offer some informations(information是不可数名词). First of all，please give me the account of the theme of the exhibition. Secondly，I also need to know what is the time of its to be held. Thirdly，what is the date of its ending. Lastly，I wonder if(加it is) convenient for you to meet us. I would like to express my gratitude for you(用your) kind consideration of my request. I look forward to hearing you from you soon. | 
