单项选择题

A．To have more knowledge about nature.
B．To put forward an explanation for birds’ abilities.
C．To better understand how a human brain processes information.
D．To better understand birds.
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单项选择题
A．He found his job boring.B．He was not qualified to be an engineer.C．He wanted to travel.D．He was not happy with the new director.
A．He found his job boring.
B．He was not qualified to be an engineer.
C．He wanted to travel.
D．He was not happy with the new director.
单项选择题
A．To return his money.B．To exchange the item.C．To give him store credit.D．To compensate him for the item.
A．To return his money.
B．To exchange the item.
C．To give him store credit.
D．To compensate him for the item.
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