There are still several unanswered questions ______ with the accident.

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问题 There are still several unanswered questions ______ with the accident.

选项 A、connect
B、to connect
C、connected
D、connecting

答案C

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。
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