I. Choose the word which has a different stress pattern from the others.

1. A. energy B. destination C. understanding D. degradation

2. A. environment B. eco-friendly C. inorganic D. vegetation

3. A. ecology B. scuba-diving C. sustainable D. historical

4. A. preservation B. equality C. economic D. entertainment

5. A. environment B. ecology C. sustainable D. beneficial

II. Read and underline the incorrect words in the following sentences. Correct them.

1. Scientists have tried to assess the impact of human activities on the environmental.

2. We should have deforestation plans to replace the trees cut down for farmland use in the region.

3. Oceanic oil spills become a major environment problem, chiefly a result of intensified petroleum exploitation.

4. The rhino habitat has been perfectly preservation in the region.

5. The students are somewhat confusion by the usage of the words "preservation" and "conservation".

6. Many climatologists believe that the decline in mountain glaciers is one of the first observable signs of globe warming.

7. Rising sea levels can add to the erode of our coastlines.

III. Rewrite these sentences using reported speech.

During a group discussion on environmental threats,...

1. Nam said (that), "The environment is severely affected by pollution.“

2. Mai said (that), "The burning of fossil fuels leads to air pollution.“

3. Peter said (that), "Intensive insecticide and pesticide sprays in agriculture make the soil contaminated.“

4. Tony said (that), "The disposal of untreated sewage in rivers and oceans leads to water pollution.“

5. Mary said (that), "Loud and annoying sounds from innumerable vehicles in the highway nearby cause noise pollution.“

IV. Join the beginnings and the ends to make complete sentences.

1. I wouldn't do that a. if it rains.

2. Carol would know what to do b. if you promise to do it.

3. You'll slip on the rocks c. if she were here.

4. I'd invite Ann to my birthday party d.if I were you.

5. I'll stay at home e. if we had a lot more money.

6.The teacher will give her a low mark f. if you wear sandals while walking in the mountains.

7. I'll help you g. if she forgets her homework.

8. We would buy a bigger house h. if she were my friend.