问题补充：
It’s that we will never forget it.
A. such a nice city
B. a such nice city
C. a so nice city
D. so a nice city
答案：
(答案→)A. such a nice city
B. a such nice city
C. a so nice city
D. so a nice city
解析：so与such 的区别，so+adj或adv，so +much 不可数名词，so many +可数名词复数形式，而such+adj +不可数名词或可数名词复数，或such+a或an +adj +可数名词单数。故选A
