You may also have noticed that a strong accent, like a Southern accent or a British accent, is less noticeable to you when someone sings than when he speaks. First, remember that what you hear as an accent is just somebody saying vowel sounds differently from how you say them. In singing, the vowel sounds are longer than in speaking; this makes any differences less noticeable.

　　Just like you, scientists are interested in the differences between singing and speaking voices. Scientists discovered that hearing a voice for just one second was enough to tell the difference between a singing voice and a speaking voice 95 percent of the time. And, I predict that people could tell the difference between a professional opera singer and your little brother singing “Jingle Bells” exactly 100 percent of the time ... although, much to my surprise, no scientists have actually done that experiment yet.

　　Yours sincerely，Dr. Cy Borg

　　6. We can learn from the second paragraph that ________.

　　A. the larynx is more important in singing

　　B. singing uses the same structures as speaking

　　C. singing involves more structures inside the body

　　D. adults and children use different structures when singing

　　7. The third paragraph is mainly about ________.

　　A. how the lung pressure is used in speaking

　　B. how to make singing sound more resonant

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