Unit 3
LOOKING BACK
PRONUNCIATION
1. Listen and underline the sounds that are assimilated.
1. t b , t →p
2. th s , θ →s
3. n p , n →m
4. d p , d →b
5. t m , t →p
2. Listen and complete the sentences.
1. green beans , n →m
2. town planning , n →m
3. food poisoning , d →b
4. Green Britain , n →m
5. light bulbs ,t →p
VOCABULARY
Complete the sentences with the correct form of the words.
1. disposal of
2. depleted
3. clutter
4. Organic
5. combustion
6. Soot particles
7.pathway
GRAMMAR
1.Combine the sentences into compound sentences.
1. We read food labels carefully, for we want to buy only organic products.
2. The burning of fossil fuels is the largest source of greenhouse gas emissions and causes air pollution.
3. Shall we organize a tree-planting day or launch a recycling campaign at school?
4. Regular exercise is essential to longevity, but it is not the only factor.
5. Noise pollution can cause stress and psychological problems, so try to spend some peaceful, quiet time in nature.
2. Combine the simple sentences into complex sentences.
1. If we change our consumption habits, we can reduce our carbon footprint.
2. we should use bicycles instead of cars because this will help reduce exhaust fumes and pollution.
3. When fossil fuels are burnt, they emit harmful gas into the environment.
4. protect the environment where you live.
5. we reuse bags, old clothes and scrap paper at home so that we can reduce waste.
3. Match the simple sentences. Then write complex sentences with which.
1.d The indoor air quality at school is better now, which has helped students to improve their concentration and test results.
2.a They have cleaned the mould from the walls, which has resulted in fewer asthma attacks.
3.e We keep our school environment clean and green, which has made us very proud.
4.b They have started using more green products, which has brought them some financial and health benefits.
5.c School staff have shown parents different ways to go green, which has had an impact on the entire community.