Выбрите правильную букву вместо "?":The longest metro is in London. It is called "?" and...

Question

Выбрите правильную букву вместо "?":
The longest metro is in London. It is called "?" and is 4000 metres kilometers long.
A) the Traffic B) the Tube C) the Drive D) Rail Way
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Answer 1

The longest metro is in London. It is called "?" and is 4000 metres kilometers long.
A) the Traffic        B) the Tube       C) the Drive       D) Rail Way