Giúp mình với 22. Solar energy does not make the environment _____. (pollute) 23. Thank you very much for a really _____ evening. (wonder) 24. He studied very hard but _____ he failed the final exam. (fortunate) 25. I believe that you can predict changes with a _____ degree of accuracy. (surprise) 26. He is an _____ man. (energy) 27. He felt very _____ after working hard. (exhaust) 28. My father used to be an _____. (electric) 29. The man climbed the mountain very______. (danger) 30. Solar energy is not only _______ but also clean. (plenty)