Forme die Sätze ins Passiv um!

1. I had worn blue shoes.
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2. Joe had cleaned the tables.
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3. We had lost the key.
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4. They had started a fight.
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5. I had been reading an article.
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6. I had not closed the window.
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7. They had not bought the paper.
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8. She had not noticed me.
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9. Had she solved the problem?
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10. Had he recorded that song?
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