1. developing

2. Environmentalists

4. flying

5. discoverer

6. scientific

7. inventor

8. productive

9. researcher

1.Viet Nam is a developed country, not a developed one. (develop)
2. Environmentalists are trying their best to protect the natural environment. (environment)
3. Aeromobil is a unique combination of car and airplane, a truly flying car. (fly)
4. Sir Alexander Fleming was the flag of the penicillin. (discover)
5. Amazing science discoveries help a lot in improving our lives. (science)
6. Thomas Edison was a wonderful inventor (invent).
7. The highly produced discussion benefited them all. (produce)
8. The famous researchers live a fairly simple life. (research)