Uzupełnij zdania poprawnymi formami strony biernej, tak aby zachować znaczenie zdania wyjściowego.

1. Isaac Newton discovered gravity.
Gravity …………………………... by Isaac Newton.

2. Millions of people visit this website every day.
This website ………………………………. by millions of people every day.

3. They didn’t deliver my new speakers yesterday.
My new speakers ………………………………... yesterday.

4. We don’t use these devices very often.
These devices ……………………………………….. very often

5. Alexander Graham Bell invented the telephone.
The telephone ……………………..by Alexander Graham Bell.

6. This company delivers thousands of packages every day.
Thousands of packages …………………………... by this company every day.

7. They didn’t build the house in 1920s.
This house ………………………………………….in 1920s.

8. We don’t clean this room very often.
This room …………………………………….very often.