8.C deforestation
9.A pollution
10.B preserve
11.D
12.A to write
13.B exhausted
14.A improve
15.C discrimination
16.D the most cultural
17.D x/x
18.C better
19.A must be cleaned
20.D touchable
21.C was walking
22.D non-renewable
23.C It's my pleasure
24.A destination
