6. "Who __________ on my chair?" asked the Little Bear when he saw that his favourite chair was broken. a) has sat b) has been sitting

6. b) has been sitting on my chair?" asked the Little Bear when he saw that his favourite chair was broken. *Перевод:* 6. "Кто сидел на моем стуле?" - спросил медвежонок, когда увидел, что его любимый стул сломан.