UNIT 4

VOCABULARY
1- MATERIALS : exercise 1, exercise 2
2- MEDICINE
 GRAMMAR
THE PASSIVE VOICE
 TRANSFORMATIONS
Exercise 1, exercise 2, exercise 3, exercise 4, exercise 5 

TOPICS WHICH BRING UP A LOT OF PASSIVE FORMS:

- Inventions: Penicillin was discovered by Alexander Fleming.

- Description of products and raw materials: Tea is grown in India.

- Stories of companies: Zara was founded in 1975 by Amancio Ortega.

- Crimes and punishment: The suspect was seen entering the building.