21. 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
22. Papousek noticed 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
23. In Papouseks 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
24. The babies would smile and bubble at the lights because______.
A. the lights were directly related to some basic drives
B. the sight of the lights was interesting
C. they need not turn back to watch the lights
D. they succeeded in switching on the lights
25. According to Papousek, the pleasure babies get in achieving something is a reflection of______.
A. a basic human desire to understand and control the world
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