A resident spotted a man __in his car ___the explosion and called the police.

问题描述:

A resident spotted a man __in his car ___the explosion and called the police.
A,sit watching B sittingwatchedC sitting watchingD sittedwatch
选C求解释并翻译和分析下句子

一位居民发现一个男的坐在车里旁观这次爆炸,(这个居民)并报了警.
【根据语境,很可能是这位居民怀疑那个车里的男子和爆炸事件有关】
这是个由and连接的并列句
第一个分句:
A resident 主语
spotted 谓语
a man 宾语
sitting in his car 宾语补足语
watching the explosion 是sitting in his car的伴随状语
and 后面为第二个分句:
主语省略了,其实和前一个分句是同一个主语
谓语:called
宾语:the police