Over the past 50 years, the advent of internet advertising as well as classified websites like Craigslist has lured away a significant portion of advertising dollars away from print advertising. The industry is in a transition phase right now, exploring options such as e-readers, monetizing digital content and new ad sales models to try and gain back print advertising losses.
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Present participle - developing. Simple past - developed. Past participle - developed.
Developed is the past participle of develop.
The past participle (and simple past) is developed.
Conventional advertising is the main types of advertising that have been done in the past. This includes newspapers, magazines, radio, TV and billboards
Had printed.
It is become smaler and smaler and in 10 years it would be so small you can wear it like a watch
Developed.
in the past