1.   He whistles with a beautiful, steady vibrato.

2.   He whistled along with the tape.

3.   Herman is an unabashed crowd pleaser, tossing his audiences tunes they can whistle with pleasure.

4.   On the street, most women walking past construction sites try not to draw the attention of male construction workers, who leer and whistle with some predictability.

5.   Some whistled with approval, but many skulked away bitterly, cursing Yasser Arafat, a man they said had betrayed their cause.

6.   With harbor whistles banging in the bay. . . .

7.   In fact, Mexican fans whistled with disapproval time and again when the Italians passed on chances to attack.

8.   Duels between snipers made the air whistle with bullets in residential areas near the main square.