单项选择题

In Papousek's experiment babies make learned movements of the head in order to ______.

A．have the lights turned on
B．be rewarded with milk
C．please their parents
D．be praised
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单项选择题
According to the author, babies learn to do things which ______.
A．are directly related to pleasure
B．will meet their physical needs
C．will bring them a feeling of success
D．will satisfy their curiosity
单项选择题
The passage tells us ______.
A．how to settle a consumer’s complaint about a faulty item
B．how to make an effective complaint about a faulty item
C．how to avoid buying a faulty item
D．how to deal with complaints from customers
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