Do You Know these Announcements/Chimes of the Metro Systems Across the World? (Test your knowledge!)

Either a chime or announcement will play over a black screen: you get to hear the announcement or chime twice before the answer is revealed on which subway/metro system that is from! Do you know which system it is? How many correct did you get out of 25?
What did you think of the quiz? Did you do well?
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