Відповіді: Стр.91 (E-Gr)

E. Discuss the inventions.

I find Post-it notes the most surprising because the glue was too weak at first. I think penicillin changed the world most because it helps treat infections.

GRAMMAR.

Rewrite the sentences using the Passive Voice.

1. Seat belts must be worn by passengers at all times. 2. Two new art galleries have been built since 2015. 3. Tents and sleeping bags are produced in this factory. 4. My new sofa will be delivered by next Friday.