Change the sentences to the passive voice.
1. The girl was arranging the books neatly on the shelves
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2. The guests were thanking the host for the lovely dinner.
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3. The reporter was congratulating the winner of the marathon.
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4. A relief teacher is teaching us how to solve the mathematics problem sum.
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5. The waiter was recommending the specialities.
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6. A young girl was plucking the flowers at the park.
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7. The workers were stacking and counting the books.
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8. The lifeguard was teaching the students how to do mouth-to-mouth resuscitation.
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