I could not remember the text .
A. However hard did I try
B. However hard I tried
C. However I tried
D. However had I tried hard
网友回答
A. However hard did I try
(答案→)B. However hard I tried
C. However I tried
D. However had I tried hard
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。