Carol Vaness，the well-known American opera singer，was born in San Diego and began her professional performance in San Francisco．She has sung at many of the major opera houses in the world．Unlike other world-famous male opera singers （Luciano Pavarotti，Placido Domingo and Marcello Giordani），she was particularly known for her Mozart operatic roles．

At the Metropolitan Opera in New York City where she often sings，Carol's voice must be loud enough to be heard by four thousand people．It must reach every person in the theater，without a microphone，even when she's singing softly．The reason Carol can project her voice that far is the way she breathes．

"When you breathe，it's like a swimmer taking a deep breath before going underwater，"Carol explains．"You have to take a lot of air into your lungs．"

According to Carol，the main difference between pop singing and opera is"how you breathe，how much air you take in，and how you control it coming out．Regular singing is more like speaking，and it's a lot softer．

Ever since she started piano lessons at the age of ten，Carol has loved music．As she got older，she decided to become a music teacher．When she went to college，she took singing lessons as part of her studies．Her voice teacher discovered that nineteen-year-old Carol had an exceptionally beautiful soprano（女高音） voice-the highest singing voice for women．

Today，Carol performs throughout the United States and Europe and she has song for almost twenty years．But she has never forgotten where she started singing in the first palace．"Put your heart into your singing and enjoy it，"says Carol，"because singing is a great joy．That's why I sing．In fact，that's why everybody sings．"

24．What is the best title for this passage？___

A．An Opera Star

B．The Way an Opera Star Sings

C．Opera Singing and Pop Singing

D．Singing without a Microphone

25．Which stateme