题目内容
10．Whatan（a/an）exciting experience it is!分析 这是多么令人激动的一次经历啊！
解答 此题考查不定冠词a与an的区别．不定冠词an常用于元音发音开头的词前． exciting的首字母e发音为元音．
故填：an．
点评 an常用于元音发音开头的词前，而不是元音字母前，这是学生们经常混淆的概念．
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