The key answer of exercise 4

a)

1. strict: adjective – describes the noun ‘teacher’
2. tax: noun – is a thing people pay
3. barks: verb – A dog does this action loudly.
4. scared: adjective – describes the noun ‘sister’
5. constantly: adverb – tells us how often the phone rings
6. soil: noun – is described by the adjective ‘good’
7. annually: adverb – says how often the visit needs to be done
8. massive: adjective – describes the noun ‘house’

b) -