3 . choose the word that has different stress pattern .

1 . A . machine            B . carbon                 C . harmful                  D . turbine

2 . A . generate            B . natural                C . effective                  D . energy

2. Fill in the blanks with the words in the box 

natural     nuclear     solar   hydro   wind      oil       biogas       coal 

1 . __________ enery comes from the heat of the Sun . 

2 . __________ can be produced by dead plants and animals as they decay .

3 . __________ is often found in the ground , consisting mainly of methane .

4 . __________ enery is enery that comes from the force of moving water

5 . __________ is flammable black hard rock , used as a fossil fuel . 

6 . __________ commonly known as petroleum , is the largest sourceof energy in the US . 

7 . To produce _________ energy , atoms are split apart , which releases energy .

8 . __________ energy is produced from moving air with the help of large turbines

3. Complete each of the sentences with the correct form of the words in the box 

19 . ___________ , the festival also marked the end of harvest, and parents who had been hard at work in the fields enjoyed spending extra time with their children . 

20 . The children wear __________ masks and dance in the streets with star lanterns that are illuminated by candles