单项选择题

Professor Smith discovered that ______

A．certain patterns can be identified in the recorded incidents
B．many people were too embarrassed to admit their absent-mindedness
C．men tend to be more absent-minded than women
D．absent-mindedness is an excusable human weakness

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单项选择题

Program assembly failures (Para. 2) refers to the phenomenon that people ______

A．often fail to program their routines beforehand
B．tend to make mistakes when they are in a hurry
C．unconsciously change the sequence of doing things
D．are likely to mess things up ff riley are too tired

单项选择题

A good education is an ______ you can fall back on for the rest of your life.

A．asset
B．ethic
C．inventory
D．obligation