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7.Though he was ______ eight-year-old boy then,he had three big apples at ______ time.(  )
A.an; theB.an;/C.aD.an; a

分析 尽管那时他是一个8岁的男孩,但他可以一次吃掉3个大苹果.

解答 答案:D 根据关键词was可知这里强调一个男孩应用a,由于紧挨着冠词的eight的首字母是元音音素,所以冠词a应变成an; 结合语境应是一次吃掉三个苹果,强调一次应该用冠词a,为at a time.故选D.

点评 此题考查冠词的用法.做题时抓住句中的关键词并结合句意准确判断出应用哪个冠词.并要注意细节,尤其是冠词后面紧挨的首字母是元音音素的情况.

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