题目内容：

7.Shirley used to live in the countryside.She ___________ there for twenty years,but now
she is used to the city life.(live)说明为什么

优质解答

had lived ,雪莉之前在农村生活,她在那里生活了20年,但是现在她已经习惯了城市的生活.
前面一句是过去式,而这句话是说她之前在那里生活,应该用过去完成时、所以用had lived.