Yingqi Bird Nest Library,the smallest library in the world,was opened to the public in Nanjing's Huashu Village ________ the World Reading Day this year.( )
A.onB.inC.atD.as
Yingqi Bird Nest Library,the smallest library in the world,was opened to the public in Nanjing's Huashu Village ________ the World Reading Day this year.( )
A.onB.inC.atD.as
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