问题详情

Which of the following contains an adverbial clause of concession(让步状语从句)？

A．As is well known, great changes have taken place in his hometown.

B．Hard as he tried, he didn"t pass the driving test.

C．As time goes by, conflicts would be reconciled.

D．Jane didn"t want to do that, as her parents were very strict with her.

请帮忙给出正确答案和分析，谢谢！