单选题 There are still several unanswered questions ______ with the accident.
【正确答案】 C
【答案解析】本题考查动词的用法。该句为there be句型, several unanswered questions是宾语,句中缺乏的是questions的后置定语;connect与questions为被动关系,应用-ed形式。该句意为:还有许多关于事故的问题未被解答。