【题目】In Shangri-la, a peaceful world ________who had discovered how to stay young forever.
A.did people live
B.lived people
C.people lived
D.were living people

【答案】B
【解析】句意：已经发现怎样永葆青春的人们生活在香格里拉，一个和平的世界。本句考查完全倒装，地点状语In Shangri-la提至句首引起全句全倒装，谓语动词提前，即lived提前，故选B。