Rewrite the following sentences using the past perfect continuous tense.

1. He had worked here for twenty years.

   
   
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2. I had written my letter.

   
   
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3. It had snowed in the night.

   
   
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4. I had driven to the hospital.

   
   
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5. They had fought each other.

   
   
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6. You had played tennis.

   
   
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7. I had waited for the bus.

   
   
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8. She had studied for her exams.

   
   
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9. He had read the newspaper.

   
   
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10. We had done the exercise.

    
    
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