单项选择题

A．To give the monkey a surprise.
B．To see how the monkey are from a box.
C．To see how soon the monkey could find it.
D．To find out how the monkey would open the box.
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单项选择题
A．A lack of available flights.B．Long delays at the airports.C．Boredom on long flights.D．Long trips to and from airports.
A．A lack of available flights.
B．Long delays at the airports.
C．Boredom on long flights.
D．Long trips to and from airports.
单项选择题
A．To find out how clever monkeys were.B．To test the intelligence of different animals.C．To tell the difference between man and the monkey.D．To find out how monkeys search for food.
A．To find out how clever monkeys were.
B．To test the intelligence of different animals.
C．To tell the difference between man and the monkey.
D．To find out how monkeys search for food.
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