单项选择题

Questions 15 to 18 are based on the passage you have just heard.
We can also draw a conclusion that the key to successful time management is ______.

A．working harder and harder
B．clever self-management
C．thinking of what to do, and how and when to do it
D．employing a skillful secretary

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单项选择题

单项选择题

Questions 15 to 18 are based on the passage you have just heard. We can also draw a conclusion that the key to successful time management is ______. 您的浏览器不支持 audio 元素。