—Did you believe his story?

—No, not at all. From ______very beginning, I knew it was ______ hoax.

A．a; a

B．a; an

C．the; a

D．a; the

来源于天南星科的中药是（）

A.天南星

B.半夏

C.石菖蒲

D.白附子

E.虎掌南星