Выбери один из предложенных вариантов ответа (Present Perfect Simple/ Present Perfect Continuous)

1. Their parents have been/have being friends since their childhood.
2. Has Nick forgotten/been forgetting to learn the rule?
3. The boys have been watching/have watched this film for an hour.
4. Dave hasn’t been/ hasn’t been being to Paris.
5. Have Mary and Sam collected/ been collecting stamps for 3 years?
6. My friends haven’t been walking/haven’t walked for two hours.