IV

1, to -> about

2, irresponsible -> irresponsibly

3, are -> is

4, start -> started

5, vocation -> vocational

V

1, Having read the stories about people who reduced their carbon footprint, …

2, Having watched the documentary about wildlife, …

3, Having spent the whole day cleaning up my room, …

4, Having taken an active part in the Green Summer activities, …

VI

1, Deforestation

2, awareness

3, admission

4, infectious

5, academic

6, dietitian

7, infectious

8, nutritious

The answers:

IV/

1.D to -> about.

2.B irresponsible -> irresponsibly.

3.B are -> is.

4.D start -> started.

5.A vocation -> vocational.

V/ MIK KHÔNG BIẾT LÀM, SORRY BẠN

VI/

1. Deforestation.

2. awareness.

3. admission.

4. infectious.

5. academic.

6. dietitian.

7. infectious.

8. nutritious.