第27题: [单项选择]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. 参考答案:D 答案解析:[解析] 根据“which can take two to four years”可知,正确答案为[D] 选项。