27. After losing all his money, he left the gambling table___________. (disappoint) 28. A quarter of that area has been_____________ in the past decade. (forest) 29. There is a ____ of 10% in the amount of money available for buying new books. (reduce) 30. Look! He is a really __________ boy with his daily activities. (energy) 31. I would like you to clean the ______________ on the beach. (pollute) 32. At present, all countries in the world are worrying about the __________ problem. (environment) 33. She turned on the lights all day. Therefore, she paid a lot of money.  As she____________ 34. I think we should make posters on energy saving and hang them around our school. I suggest posters 35. The weather will be fine today. Our family will have a picnic outside.  If _________ 36. John spends most of his free time participating in social activities.  John spent _________