If you go to Xi’an you will find the palaces there more magnificent than commonly＿＿.A. su

问题补充：

If you go to Xi’an, you will find the palaces there more magnificent than commonly＿＿.

A. supposing

B. supposed

C. to suppose

D. suppose

答案：

A. supposing

(答案→)B. supposed

C. to suppose

D. suppose

解析：本句为比较状语从句的省略,省去了they are。