11.   If optimism has a sound, Mike Keane flinging one-liners around a bustling Dallas Stars locker room has to be close.

12.   In this booming border city, free trade has a sound.

13.   It has the sound of an old Americanism, but is nowhere to be found in the dialect dictionaries.

14.   Listener attentiveness has a sound of its own, and here one heard the silence.

15.   Not all locomotives have sound, but you can buy a locomotive with sound, or a boxcar with all the gear needed for sound.

16.   Now I buy CDs and cassette tapes, which have better sound and take up less space.

17.   Now I have no sound at all!

18.   Of course, not all bands have a sound that is so convivial or that makes for family togetherness.

19.   People should be able to have different sounds.

20.   That, scientists say, would allow organisms to be even more versatile, just as some languages have sounds or express concepts not found in English.