相关Ifyouhappentobevisit的文学知识

问题详情：    IfyouhappentobevisitingLondonthissummer,there'sachancethatyou'llfindbooksleftontheseatofsomebusorsubwayforyou.BooksontheUndergroundisareallysimpleidea:leaveabookyouloveforastrangerto...