1.   He exited the stage quickly, pausing just long enough to exchange hellos and shake hands with a white-haired veteran who attempted to draw him into conversation.

2.   Howe slapped palms and exchanged hellos with a handful of replacement players during one of his interviews.

3.   In the cafeteria at lunchtime, she exchanges warm hellos with many students, but says that her closest friends are Muslim.

4.   Ms. Bentley exchanged innocuous hellos with him and went to get a cup of coffee before returning to her office.

5.   The two shook hands and barely exchanged hellos.

6.   They exchanged hellos, and went on their way.