问题补充:
Jumping out of airplane at a height of 5000 kilometers is unforgettable experience.
A. an ; a
B. an ; an
C. an ; /
D. a ; an
答案:
A. an ; a
(答案→)B. an ; an
C. an ; /
D. a ; an
解析:考查冠词用法。修饰可数名词用不定冠词a/an;这里的“一架飞机”是泛指,airplane首字母发音是元音,故用an,排除D;experience指“经历”时,是可数名词,unforgettable首字母发音是元音,用an修饰,排除A、C,故选B。