Change the following sentences into active forms

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I. Change the following sentences into active forms.
Example:
Portraits were often displayed in public places.
> People displayed portraits in public places.
1. Individuals or families were asked to sit for the portraits so that the
artists could capture them on canvas.
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2. Money was paid to the artist, who spent a lot of time working on the
portrait.
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3. Once photography was invented, cameras were used to take portraits.
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4. Portraits could be done quickly and cheaply.