____he tried to pass the driving test, he still failed the secon

____he tried to pass the driving test, he still failed the second time.
A、As hard
B、Though hard
C、Hard as
D、No matter hard
【正确答案】：C
【题目解析】：这里是让步状语从句。只是连接词是as，而且一般是放在从句的第二个单词位子上，相当于 Though he tried hard，Hard though he tried，No matter how hard he tried，However hard he tried。