问题补充：
Guilin is the most beautiful place people all over the world want to visit.
A. where
B. which
C. what
D. that
答案：
A. where
B. which
C. what
(答案→)D. that
解析：考查定语从句：句意：桂林是全世界的人都想参观的最美的地方。定语从句中缺少宾语，应该是that或which引导定语从句，但是先行词是the most beautiful place，由最高级修饰先行词的时候，只能用that，不能用which做关系代词。选D。
