—Did you believe his story?—No not at all. From very beginning I knew it was hoax.A. a

问题补充：

—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

答案：

A. a; a

B. a; an

(答案→)C. the; a

D. a; the

解析：句意:-你相信这个故事吗？-不，一点也不信。从最开始，我就知道这是一个骗局。the very beginning 最开始，very 在这里起到强调的作用；a hoax 一个骗局。故选C。