题目内容
14．-Have you seen _______i-phone 5s，Jack？-Is it a black one？I think I saw ____ somewhere．（ ）
| A． | an，that | B． | the，it | C． | the； that | D． | an，it |
分析 -Jack，你看见过一个苹果5s吗？
-一个黑色的吗？我在什么地方看见过．
解答 答案：D．
本题考查冠词的用法．表示数量为"一"用a或者an来表示泛指，根据题意"你看见过一个苹果5s吗？"可知本空表示泛指，所以要填a或者an，另外，i-phone首字母i的音素为元音音素，所以用不定冠词an来表达．it指代上面的苹果5s，指原物，而that指代上面提到物品的同类物品，并非原物．故选D．
点评 做这种题时，根据语境和题意，首先确定考查的是冠词的用法；再就是要注意不定冠词a，an表示"一个"；同时要注意元音音素前面要加不定冠词an．再次注意it和that的区别，it指原物，that不是指原物．
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