Jumping out of airplane at ten thousand feet is quite exciting experience.A. an; anB. /;

Jumping out of airplane at ten thousand feet is quite exciting experience.
A. an; an
B. /; the
C. /; an
D. the; the

(答案→)A. an; anB. /; theC. /; anD. the; the解析：句意：在一万英尺的高空,从一架飞机上跳落是很刺激的一次经历。第一个空应该填不定冠词,因为是泛指；第二个空填不定冠词是因为experience表示“经验”时才是不可数名词，而此处表示“经历”，是可数名词，因为同样是泛指，所以也应该填入an，选A。

感谢回答，我学习了