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Level 21

Active into passive voice

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A fall in sales was predicted
He predicted a fall in sales.
Increased consumption has been observed
They have observed increased consumption.
Climate change is thought to be
People think climate change is...
The rate of inflation was calculated
Scientists calculated the rate of inflation
Evolution was discovered by Darwin
Darwin discovered evolution
The Last Supper and Mona Lisa were painted by Da Vinci
Da Vinci painted Mona Lisa and The Last Supper