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    Question

    Select the most appropriate meaning of the underlined

    idiom in the given sentence. This problem is a hard nut to crack,it will take longer than they imagined.
    A needs a lot of work Correct Answer Incorrect Answer
    B is not interesting enough Correct Answer Incorrect Answer
    C is difficult to solve Correct Answer Incorrect Answer
    D involves breaking nuts Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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