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    精英家教网 > 高中英语 > 题目详情
    _____ you understand this rule, you will have no difficulty in finishing the task.

    A. Until
    B. Once
    C. Though
    D. Unless
    B
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    科目：高中英语 来源：同步题 题型：单选题

    _____ you understand this rule, you will have no difficulty in finishing the task.
    [     ]
    A. Until
    B. Once
    C. Though
    D. Unless

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