I. Choose the word that has different pattern :

1. B. pollution (2) 

2. B. disposal (1) 

3. C. pernament (1) 

4. A. groundwatee (1) 

II. Combine the sentences :

1. I am a member of the anti-pollution program in my school so i often go to school by bus

2. Because of the tree in this area's being cleared off , public facilities would be contructed

3. Since fresh, clean ... , no one can live without it

4. Kim never cleans her room because her mother is complaining

5. Many aquetic animals are dead due to the polluted water 

-> since / because / as + S + V : bởi vì

due to / because of + N/Ving : bởi vì

III, Complete the sentences using the correct forms of the verbs :

1. treated

2. poisonous : độc hại

3. enviromental : thuộc về môi trường 

4. contaminated : ô nhiễm

5. radiology : x quang