第17题: [单项选择]{{B}} Passage One
Questions 26 to 28 are based on the passage you have just heard.{{/B}} A. Three weeks. B. Two weeks, C. Four weeks. D. Five weeks. 参考答案:C 答案解析:[听力原文]
How long does the most important training course last
[详细解答] 见第三段第一句,“The most important