单项选择题

It can be inferred from the statement about mother chimpanzees and their young (lines 21—23) that young chimpanzees have difficulty ______.

A．communicating with their mothers
B．adding quantities
C．making choices
D．opening hard nuts
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单项选择题
What is the purpose of the honeybee's dance
A．To determine the quantity of food at a site.
B．To communicate the location of food.
C．To increase the speed of travel to food sources.
D．To identify the type of nectar that is availabl
单项选择题
Scientists concluded from the experiment with chimpanzees and chocolate chips that chimpanzees ______.
A．lack abilities that other primates have
B．prefer to work in pairs or groups
C．exhibit behavior that indicates certain mathematic ability
D．have difficulty selecting when given choices
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