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Complete the following sentences using past perfect.
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1. My sister realized she �(forget) her ticket when we got to the stadium.
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2. When we got to the airport the plane �(leave).
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3. When I got to his house, my cousin �(wake up).
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4. We �(hear) about the accident by the time Jessy got home.
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5. The party �(start) when I arrived.
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6. I �(eat) when I came to the university.
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7. She �(study) when she took the test.
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8. They �(buy) the tickets when they went to the concert.
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