__________explain it to him， he still didn‘t understanD.
A.Hard as I tried to
B.As I tried hard to
C.Hard I tried to
D.Tried as I hard to

A.A.Hard
B.As
C.Hard
D.Tried

【参考答案】

A
as引导的让步状语从句需要倒装，将副词提前即可。