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1. They have been building the new road for a long time now.(under construction)
2. They had been training the horse for the race for over a year. (in training)
3. They have been dicussing the issue in Parliament. (under discussion)
4. They had been observing the criminal for the past two weeks. (under observation)
5. They have been using this plane for over 25 years now. (in use)
6. They have been developing the Cyborg D423 robot for over ten years. (in development)
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