问题补充：
单选题Wehavefinishedtheprojectfinally.Noonecanimaginethedifficultywehad_____theproblem,A.to solveB.solvedC.solvingD.solve
答案：
C
时间：2023-05-11 23:50:56
单选题Wehavefinishedtheprojectfinally.Noonecanimaginethedifficultywehad_____theproblem,A.to solveB.solvedC.solvingD.solve
C
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