passive sentences.

Mobile phones weren't invented by Apple. <--You can say this, but it is grammatically incorrect to write this sentence. Mobile phones were not invented by Apple. Or you can say/write: Apple did not invent the mobile phone. Apple didn't invent the mobile phone.

Lead petrol isn't used in nowadays. Nowadays, no one uses lead petrol.

Low-cost flights are sold online. You can also say/write: Cheap flights are sold online.

The Petronus Towers were designed by Argentinian an architect. The Petronus Towers were designed by an Argentinian architect.

Avatar wasn't directed by Steven Spielberg.

Minis aren't made by any more a British company. Minis are no longer made by a British company.

passive sentences.

Mobile phones weren't invented by Apple.
Lead petrol isn't used in nowadays. (in these days = nowadays)
Low-cost flights are sold online.
The Petronus Towers were designed by Argentinian an architect. (an Argentinian, word order)
Avatar wasn't directed by Steven Spielberg.
Minis aren't made by any more a British company.

Minis aren't made by a British company any nore.

Minis are no longer made by a British company.