IV. Change the following sentences into the opposite voice (active or passive).
1. Alexandre Eiffel designed the Eiffel Tower for the Paris World's Fair of 1889.
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2. His painting will be exhibited for the first time by New Arts 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 university.
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8. They have already finished their work as requested.
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