I.            Supply the correct form of the words in brackets.

1.      The slums are often ____________, with many people crammed into very small living spaces. (crowd)

2.      Most _____________ energy sources are fossil fuels such as coal, petroleum, and natural gas. (renew)

3.      Dean Kamen is an ____________ of the Segway scooter. (invent).

4.      ______________________________ materials can be processed and used again. (recycle)

5.      By 2035, the world's population will _____________ 50% more energy. (consumption)

6.      New York is one of the most _______________ diverse cities in the world. (culture)

7.      Children tend to be more _____________ than adults. (imagine)

8.       is about not having enough money to meet basic needs. (poor)