单项选择题

What does "paying attention" mean in the 4th paragraph

A．Putting concentration on unexpected things.
B．Looking closely at unexpected things.
C．Expecting without knowing what to expect.
D．Being careful with unexpected things.

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单项选择题

What does creativity require that you do

A．Pay attention to everything.
B．Pay attention to nothing.
C．Pay particular attention to something.
D．Pay attention to unfamiliar things.

单项选择题

From the passage we learn that human brains.

A．improved the art of speech exclusively
B．developed only with the use of tools
C．and the art of speech had a mutual improvement
D．accorded with languages that stimulate them