London Underground and New York Subway are famous transport systems （运输系统）in the world．The two systems are similar to each other，but there are also important differences between them．The following tablesetsout some of the similarities and differences．We believe that the information is all correct．As the information is not always collected in the same way，it is often difficult to fully compare．The following table shows how the two systems compare with each other．
| Number of lines | 12 | 25 |
| Number of stations | 275 | 468 |
| Age of stations | From 1863 | 1900-1930 |
| Deepest station | 192feet | 180feet |
| Longest distance between stations | 3.9miles | 3.5miles |
| Longest journey without changes | 34miles | 31miles |
| Passengers/year | 1billion | 1.3billion |
| Hours of operations | 20hours/day | 24hours/day |
A．leavesB．showsC．brings D．takes
51．How long is the longest subway line in New York？___
A.31miles．B.34miles C.3.5miles D.3.9miles
52．How many hours does the uderground keep running in London every day？___
A.25 B.24 C.20 D.12
53．According to the passage，which of the following isTRUE？___
A．New York has the deepest subway station．
B．London has the oldest underground station．
C．London has more underground stations than New York．
D．It is more convenient to take the underground in London．