The dishes were washed by my sister last week.The floors were cleaned by the janitor at school.The windows were washed by a professional cleaner.The homework was completed by the students in class.The trash was taken out by the maintenance staff.The walls were painted by a team of contractors.The test was graded by the teacher.The books were organized by the librarian.The presentation was prepared by a group of students.The project was submitted by the deadline.