在下列道教名山中，已列入《世界文化遗产名录》的两座是（）。

A．武当山、龙虎

B．三清山、阂皂山

C．武当山、青城山

D．青城山、龙虎山

I was most favorably struck by the assurance with which the boy answered all my questions.

A．insurance

B．confidence

C．reluctance

D．independence