The classroom is cleaned by the students every day.
The box is made of paper.
The house is often made of trash today.
The apples are cut by knives.
The computer is used by my sister.
The flowers are watered every week.
The car should be washed every month.
The homework must be finished by yourselves.
The patients are looked after well by nuses.
The sun is turned around by the moon.
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