题目内容
（请给出正确答案）
[主观题]
A．It was opened in the 20th century.B．It was built under the busy streets of London.C．
A．It was opened in the 20th century.
B．It was built under the busy streets of London.
C．A lot of workers worked for the Victoria Line.
D．No one checks and collects the tickets on the platform.
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