When different cultures we often pay attention only to the differences without noticing t

问题补充：

When different cultures，we often pay attention only to the differences without noticing the many similarities.

A. compared

B. being compared

C. comparing

D. having compared

答案：

A. compared

B. being compared

(答案→)C. comparing

D. having compared

解析：此处是连词when＋分词短语作时间状语，相当于一个状语从句，但分词的主语和主句的主语必须为同一个。此处从句的主语是we，compare这个动作是we主动进行的，应用现在分词表示。