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    【题目】

    As a child,you had no reason to shout at your parents, ______the excuse might haven．

    A. however

    B. whatever

    C. whichever

    D. whenever

    【答案】B

    【解析】本题考查名词性从句。分析从句的句子结构可知，might have been后缺少表语，however表示主语“怎么样”；whatever表示主语“是什么”；whichever表示选择“哪一个”；whenever只能作状语，表示时间。根据句意“无论你的理由是什么，作为孩子，你对父母大喊大叫都没有道理”可知，whatever符合题意。

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