Past Perfect and Past Perfect Continuous

Choose the correct tense form to complete each sentence.

1. I ... to dance until I understood I was hopeless.

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2. It was a fantastic experience because I ... never … in a plane before.

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3. They ...  the product for 2 months before they launched it.

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4. We were so disappointed. We ...  for this event for 3 years.

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5. My sister ... long at the airport when they announced about the delay of her flight. 

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6.She ... for more than ten years by the time she moved to Miami. 

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7. How long ... you ... when you understood that you were lost? 

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8.It was so clean when we got back to our hotel room. The maids ...  all morning

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9.  She ... already... the report when her boss arrived by 3 o'clock.

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10.Bill ... the work by the time his parents returned.

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11. When I ... breakfast I rang him up 

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12....  the store already ...  by the time you arrived?