Unit 3: LANGUAGE
Vocabulary
1.Match each word or phrase with its meaning.
1. c
2. d
3. b
4. f
5. e
6. a
2. Complete the sentences.
1. pathway
2. mould and mildew
3. asthma
4. dispose of
5. depleted
PRONUNCIATION: Assimilation
1. Listen and repeat

2. Listen and repeat.
GRAMMAR
Simple, compound, and complex sentences
1. Which of the following are simple, compound, and complex sentences.
1. Simple
2. compound
3. Complex
4. Simple
5. Complex
6. Complex
2. Combine the sentences.
1. If we all adopt a green lifestyle, we will help conserve our natural resources.
2. Some foods taste good, but they do not have many nutrients.
3. We should keep the school air clean because this will improve students’ concentration and help them to learn better.
4. Germs can cause infections in parts of our body and can make us feel unwell.
5. When we all start conserving the environment, we can all enjoy better living conditions.
6. Coal, which is still used in a lot of power plants, remains one of the most important energy sources.
Relative clauses with which
3. Combine the sentences.
1. The water in this river is seriously polluted, which places some species of native fish in danger of extinction.
2. The air in most classrooms in this school contains a lot of harmful gases, which is very worrying as many young children are studying here.
3. We should all go green by practising the 3Rs: reduce, reuse, and recycle, which is always encouraged by environmentalists.
4. Illegal dumping is strictly prohibited in the town, which has helped to keep our environment clean and green.
5. Young people are starting to practice simple green living, which will help to save our planet for future generations.