______, the new electronic device they designed is now in regular operation.A、Wi

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问题 ______, the new electronic device they designed is now in regular operation.

选项 A、With the solved problem
B、With this problem being solved
C、With the problem solved
D、With this problem to solve

答案 C

解析考查独立主格结构。problem与solve是被动关系，因此用过去分词。

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