They thought the attack was part of the show when they saw a person appearing at the front of the theater during the movie, pointing a gun at the crowd.

A、当看到电影院前面出现一个人拿着枪指向观众的时候,他们还以为那是电影的一部分。
B、当他们看到有人拿着枪向观众的时候,他们以为还在拍电影呢。
C、当他们看到电影院前面有人拿枪指着观众时,他们以为是在拍电影。
出自:国家开放大学网络实用技术基础