II. Complete the sentences with the correct forms of the words in the brackets: 1.Have you found a………………………………... to that math problem? (solve) 2.Natural sources cannot provide enough energy to support this…………………….. world. (crowd) 3.Do you know that we have…………………………….…. cars? They don’t need a driver. (drive) 4.Of all the………………………………………. in the world, which one do you like best? (invent) 5.Playing outside is……………………………………………….…….. than staying inside. (health) 6. Traffic acccidents can be …………………….....if people obey the traffic rules strictly.(prevent) 7. You must get a ............................................................. licence before you can drive a car. (drive) 8. …………………………………….….., fossil fuels are harmful to the environment. (fortunate) 9.Most ………… energy sources are fossil fuels such as coal, petroleum, and natural gas. (renew.) 10.Dean Kamen ………………………………………………… the Segway scooter. (invent). 11.By 2035, the world's population will …………………………50% more energy. (consumption) 12.Carnival (Carnaval in Portuguese) is a popular ………. in many countries in South America.(festive) 13. Coal is also ………………………………………., there is a large reserve globally.(plenty) 14. The movement of waves anf tides can be able to………………………………....electricity. 15. Scientists are looking for clean and………………………sources of energy.(effect)