Choose the correct verb form (Past Perfect Simple or Continuous).1. The flat was dirty. They hadn't (cleaned/ been cleaning) it for weeks.2. I was sad when I sold my car because I had (had/been having) it for a very longtime.3. I knew all those facts because I had (read/ been reading) about it in the report.4. My stomach ached because I had (eaten/been eating) too much at the party.5. He was very nervous at the beginning of the match because he had never(played/been playing) in the prime league before.6. The roads were wet and dangerous because it had (rained/been raining) all night.7. When I arrived at the party, Ann had already (left/been leaving).8. We were good friends and we had (known/been knowing) each other for a longtime.9. They had (walked/been walking) for five hours before they reached the village.10. I had (felt/been feeling) sleepy all day so I had to drink a lot of coffee.​