34.Alexander Fleming discovered penicillin in 1982.
- Penicillin.....was discovered by Alexander Fleming in 1982.
35. The black dress is more expensive than the white one.
> The white dress is not as expensive as the black one

34.Alexander Fleming discovered penicillin in 1982.
- Penicillin was discovered by Alexander Fleming in 1982.
35. The black dress is more expensive than the white one.
> The white dress is cheaper than the black one.