单项选择题

Questions 22-25 are based on a monologue about a London taxi driver．
How long does the training period last

A．Two to fourmonths．
B．About three weeks．
C．At least half a year．
D．Two years or more．

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Questions 22-25 are based on a monologue about a London taxi driver． How long does the training period last 您的浏览器不支持 audio 元素。