Помогите пожалуйста
Choose the right tense


1) Sue ( had fallen / had been falling ) asleep before her grandparents returned
home. 2) They ( had been living / had lived ) in the city for 15 years before they
moved to the countryside. 3) Sam ( had shaved / had been shaving ) his beard
and he looked very nice. 4) How long ( had she been studying / had she studied)
Spanish before she first visited Spain? 5) Tim ( had worked / had been working) in his garage all afternoon so his jeans were very dirty