13, The problem of energy shortage will be solved by using solar energy
14, Solar panels will be install on the roof of our house next week
15, Is the craks being checked on the water piper now by the plumber
16, The old power themal plant will be destroyed at the end of the year
17, Have this food been made by your parents
18, This building can design easily by the engineers
19, Fossil fuels won't be burned for energy in the future
20, The dust bins should be put around the school yard to prevent student from throwing trash on the ground
