11.   The program was live and could be rebroadcast only by kinescopes of dubious quality.

12.   Well, yes, but most agree that it is due far more to convenience and viewer laziness than their dubious quality.

13.   When taken together with an Internet connection of dubious quality, an Internet voice call can become dicey.

14.   Dumped by his girlfriend and with his video business gone bust, he pins his hopes on his recently completed screenplay, a script of dubious quality.

15.   Many were of dubious quality.

16.   Those who can afford it are forced to seek treatment at private clinics whose service is of dubious quality given their lack of personnel and equipment.