{{B}}quEstions 23-26{{/B}}

A、thE First linE oF lonDon’s suBwAy systEm wAs Built in 1816.
B、in lonDon, suBwAy is morE oFtEn CAllED "unDErgrounD" or "tuBE".
C、poor tourists ChoosE to trAvEl ArounD lonDon By thE suBwAy,
D、lonDon’s suBwAy systEm is out oF DAtE now.