【正文】 ld be. So in addition to the baby?s seeing the more expressive parts of its mother, there is further advantage that the mother is herself more sensitive to the leftheld baby. This may sound farfetched, but just possibly, it could provide a slight extra benefit for those mothers displaying the strange onesided bias when cradling their infants. How does a bias occur? Do the mothers have an instinctive preference for it, or do they learn it by trial and error, unconsciously adjusting the position of the babies until the babies are calmer? The surprising answer is that it seems to be the baby not the mother who controls the bias. Observation of new born infants when they were only a few hours old revealed that they e into the world with a preprogrammed tendency to turn their head to the right. If the new born baby is gently held in a dead central position and then released, it naturally swings to the right far more often than to the left. This happens in nearly 70 percent of babies. This may be only a part of explanation, because the holding bias is 80 percent not 70 percent, but it adds a further intriguing chapter to the story. 61. How does the author develop Paragraph 1? A. By giving an example as a hook. B. By giving a general statement and narrowing it down. C. By asking a question and showing an answer. D. By explaining the importance of understanding a phenomenon. 62. The underlined word “audible” in Paragraph 3 means . A. soft B. clear C. weak D. distant 63. What?s the main idea of Paragraph 5? A. The left side of the human face expresses emotions more strongly than the right. B. A mother?s left eye and ear are more sensitive to the emotional changes in her baby. C. A baby may be more able to “read” its mother?s emotions than was previously believed. D. Holding her baby in the left arm may improve a mother?s emotional munication with it. 64. What is the author?s tone when he discusses why most mothers cradle their babies in the left arm? A. Cautious. B. 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