our civilization cannot be thought of as---in a short period of time A having been created B being created 帮我分析一下
问题描述：
our civilization cannot be thought of as---in a short period of time A having been created B being created 帮我分析一下
答
这句话的意思是说,不应把我们的文明看作是短期内创造出来的.
be thought of as 是说,被认为,被看做……as在这里是介词,后面应接名词性质的词,而这里的话我们创造文明是已经发生的动作,所以选A.