14. It is warm and sunny today. We go to the park. (because) 15. Nick seems to be a trustworthy person. I don't ask him for any advice before making important decisions. (however) 16.Many teenagers...

Here are the completed sentences: 14. It is warm and sunny today, so we go to the park. 15. Nick seems to be a trustworthy person, however, I don't ask him for any advice before making important decisions. (This sentence might be rephrased for better clarity: "Although Nick seems to be a trustworthy person, I don't ask him for any advice before making important decisions.") 16. Many teenagers are victims of cyberbullying, as a result, they become depressed. 17. Our awareness campaign was a success, although we still need to do more to stop cyberbullying. 18. The forest has become a nature reserve, therefore, people are not allowed to camp or hunt there. 19. There have been many campaigns to end deforestation, but trees are still being cut down. 20. There was peer pressure from my friends, however, I didn't skip lessons. (This sentence might be rephrased for better clarity: "Despite the peer pressure from my friends, I didn't skip lessons.") 21. Mandy is doing environmental projects, in addition to helping teenagers find part-time jobs. 22. We made an effort to save our local park, but it was sold to a property developer.