Change the following sentences ino the opposite voice ( active or passive)

 Change the following sentences ino the opposite voice ( active or passive)
1.Alexandre Eiffel designed the Eiffel Tower for the pái World's Fair of 1889.
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2.His paiting will be exhibited for the first time by New Art Gallery.
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3.People said that the Pyramids of Egypt is one of the wonders of the world.
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4.They have to change the plan to Florida because of the rough weather .
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5.He is being questioned about the stolen goods by the police .
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6.Were you taught how to apply this theory by your teacher ?
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7.they usually hold the concerts at the univesity.
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8.They have already finished their work as requested.
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