Going on a trip into space must be quite exciting experience.A. / ; theB. / ; anC. the;

问题补充：

Going on a trip into space must be quite exciting experience.

A. / ; the

B. / ; an

C. the; an

D. the; a

答案：

A. / ; the

(答案→)B. / ; an

C. the; an

D. the; a

解析：考察冠词。Space指太空是一个专有名词，单独使用。Experience作为经历来讲是一个可数名词，使用an。结合句意可知B正确。句意：到太空旅游是一次令人兴奋的经历。