Jumping out of airplane at ten thousand feet is quite exciting experience .A. 不填；theB. 不

问题补充：

Jumping out of airplane at ten thousand feet is quite exciting experience .

A. 不填；the

B. 不填；an

C. an；an

D. the；the

答案：

A. 不填；the

B. 不填；an

(答案→)C. an；an

D. the；the

解析：本题考查冠词。从一架飞机跳出来，泛指an airplane；experience做经历是可数名词，故加不定冠词。故选C。