问题补充：
–Shanghai is the city the world Expo is held.
--So it is a city most of us want to vist this summer.
A. which, that
B. where, where
C. in which, where
D. where, that
答案：
A. which, that
B. where, where
C. in which, where
(答案→)D. where, that
解析：本题考查的是先行词为地点时.如果在从句中状语.就选where.在从句中作宾语或主语时.用which或that.故选D
