But what happened when these babies accustomed to English heard Spanish? The 12-month-olds studied the mouth longer, just like younger babies. They needed the extra information to recognize the unfamiliar sounds. That fits with research into bilingualism (双语)that shows babies’ brains adjust themselves to distinguishing the sounds of their native language over other languages in the first year of life.

　　The continued lip-reading shows the 1-year-olds clearly still are fit for learning. Babies are so hard to study that this is “a fairly heroic data set”, says Duke University cognitive neuroscientist Greg Appelbaum, who found the research so fascinating that he wants to know more.

　　28. According to the first paragraph, babies______.  A. might get its voice “mama” by lip-reading  B. learn to talk just from hearing the sounds  C. like to figure out how to shape their lips  D. communicate with parents through gestures 

　　29. What is necessary in developing babies’ speech according to Lewkowicz?

　　A. Playing baby DVD nearby.

　　B. Teaching babies to read English. 

　　C. Speaking with babies face to face. 

　　D. Speaking different languages in front of babies.

　　30. Which of the following shows the right change of babies’ eye gaze according to the text?

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