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29. 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 注：考第三个实验结果，observation 引导 30. 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 B) the satisfaction of certain physiological needs C) their strong desire to solve complex problems D) a fundamental human urge to display their learned skills 注：考最后一段，最后一句的同义改写 26. 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 注：主题题，第二段末句 It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome. | 
