题目内容
It’s _________unlucky day today because I lost_______useful book.
A．an; an B．a; an
C．a; a D．an; a
D
【解析】
试题分析：句意：因为丢了这本有用的书，今天是一个不幸运的一天。分析：考查不定冠词的用法，表示泛指时用不定冠词a/an, 在以元音音标前用an；在以辅音音标前用a.结合题文：unlucky是以元音音标开头的单词，而useful是以辅音音标开头的单词，结合选项第四项正确。故选D
考点：考查不定冠词的用法。
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