单项选择题

Questions 27—30 are based on a report about procrastinators: students who put off studying. You now have 20 seconds to read Questions 27—30.
What is the root of procrastination

A．genetics,
B．Sleeping far less than needed.
C．Drinking more than was intended.
D．An inability to regulate behavior and control impulses.

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单项选择题

Questions 27—30 are based on a report about procrastinators: students who put off studying. You now have 20 seconds to read Questions 27—30. What is the root of procrastination 您的浏览器不支持 audio 元素。