1.   The nonpareil Lily Pons sang the role on tour.

2.   Although I will never sing the role of Violetta, I would at least like to hear it and see it at the Met.

3.   And he points out that numerous roles can be sung only by blacks.

4.   As was the custom in Italy, she sang the role in Italian instead of its original French.

5.   At times, one can almost imagine it as grand opera, with Placido Domingo, perhaps, singing the role of Kowalski.

6.   Because each one has to look like the baritone who sings the role, and the company has had several over the years.

7.   But he occasionally sang larger roles as well.

8.   But in almost all other cases, there was no available substitute artist who could sing the role on short notice.

9.   But more important is to sing your role knowing what the words say.

10.   But you must have uncommon stamina and soaring power for Isolde, and Ms. Eaglen is the first soprano since Ms. Nilsson to make singing the role seem natural.