Jumping out of __airplane from such a heigh place is quiet __exciting experience for himA.the ;a B.an; an C a;an D.the;anWhy?

Jumping out of __airplane from such a heigh place is quiet __exciting experience for himA.the ;a B.an; an C a;an D.the;anWhy?
Jumping out of __airplane from such a heigh place is quiet __exciting experience for him
A.the ;a B.an; an C a;an D.the;an
Why?

Jumping out of __airplane from such a heigh place is quiet __exciting experience for himA.the ;a B.an; an C a;an D.the;anWhy?
这是指从飞机上跳下这件事,所以不用THE,这样的话,又因为是元音因素发音的关系,所以选B咯~~

a e
为在次元音发音，前加an