问题补充：
单选题Icouldnotrememberthetext.A.However hard did I tryB.However hard I triedC.However I triedD.However had I tried hard
答案：
B解析考查让步状语从句。状语从句应该使用陈述语序，排除AD，hard应该跟在however的后面并被however修饰。句意：无论我多么努力，我都不能记住课文。
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