【单选题】 ______, the new electronic device they designed is now in regular operation.
- A. With the solved problem
- B. With this problem being solved
- C. With the problem solved
- D. With this problem to solve
网考网参考答案：C
网考网解析：
本题考查独立主格结构。problem与solve是被动关系，因此用过去分词。 查看试题解析出处>>
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