Jumping out of ___ airplane at a height of 5000 kilometers is ___ unforgettable experience.

A. an ; a B. an ; an C. an ; / D. a ; an

 

B

【解析】

試題分析：考查冠詞用法。修飾可數(shù)名詞用不定冠詞a/an；這里的“一架飛機(jī)”是泛指，airplane首字母發(fā)音是元音，故用an，排除D；experience指“經(jīng)歷”時(shí)，是可數(shù)名詞，unforgettable首字母發(fā)音是元音，用an修飾，排除A、C，故選B。

考點(diǎn)：考查冠詞用法

 

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