Turn these sentences into passive voice

Turn these sentences into passive voice.

      1. The shopkeeper inside the Temple of Literature sold to you the souvenirs and postcards at a higher price.

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      2. Famous lecturers and tutors teach the students in the university.

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      3. They choose my father the head master of Chu Van An Lower Secondary School.

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      4. The gardeners of the Temple of Literature take care of the trees and flowers.

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      5. They sold all the tickets for the trip to the Temple of Literature.

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      6. UNESCO regarded Ha Long Bay as a World Heritage Site in 1994.

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      7. People regard Oxford University as one of the best universities in the UK.

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      8. People regarded The imperial Academy as the first university in Viet Nam.

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      9. King Le Thanh Tong erected The Doctors' stone tablets.