Exercise 1: Find the word with different sound in the underlined part in each line. 1.​A. sun​​​B. solar​​​C. sure​​D. safe 2.​A. pollute​​B. nuclear​​​C. fuel​​​D. consume 3.​A. coal​​B. carbon​​​C. country​​D. cycle 4.​A. gather​​B. energy​​​C. group​​D. biogas 5.​A. heat​​B. reach​​​C. meat​​D. great Exercise 2: Put the following sources of energy into the correct column. solar energy natural gas coal plants animals liquidwater geothermal energy oil nuclear fuels biofuels petroleum hydro power wind Non-renewable sources Renewable sources