11.   Even experienced opera buffs have found that titles can revitalize works once considered rarefied.

12.   Giuliani and Hsiao are both ardent opera buffs.

13.   Happy that someone was in charge, the opera buffs complied.

14.   He was never an opera buff, he said, but he was once musical.

15.   Her comments reflected the doggedness with which opera buffs in China can try to guard their turf.

16.   He was also an opera buff with a baritone voice who wrote opera reviews for a Brazilian news magazine.

17.   Her attitude exasperated many opera buffs, particularly Wagner fans, who heard in her enormous voice the Isolde and Brunnhilde of the future.

18.   Kosner, an opera buff who also collects models of vintage sports cars, said he would begin work next week.

19.   Opera buffs and professionals have routinely trekked to Cooperstown for these offerings.

20.   Opera buffs tend to feel passionately about natural sound.