44. Various artistic and (cultural/ culture/ cultures) activities are held in Da Lat in the Flower Festival
45. Burning Man is a (music/ musical/ musician) festival held at the end of August.
46. The sun and the wind are other (alternative/ renewable/ fossil) sources of energy
47. The wind turns (turbines/ solar panels/ machinery) to make electricity.
48. You should walk to school to save (solar /hydro / energy)
49. (How often/ How far/ How long) is this festival celebrated?" -"Twice a year"
50. You should walk to school to save (solar / hydro / energy)
51. At this time next week, we (install/ will installed/ will be installing) a wind turbine in our garden.
52. Someone's carbon (footprint/ energy/ effect) is a measurement of the amount of carbon dioxide that their
activities produce