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
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单项选择题
Papousek notices in his studies that a baby ______.
A．would make learned responses when it saw the milk
B．would carry out learned movements when it had enough to drink
C．would continue the simple movements without being given milk
D．would turn its head to right or left when it had enough to drink
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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