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It is _______ unusual thing for us to find ________ UFO.


  1. A.
    a; a
  2. B.
    an; an
  3. C.
    a; an
  4. D.
    an; a
D
试题分析:句意:对于我们来说,发现一个不明飞行物是一件不寻常的事情. 结合语境可知前一空泛指任何一件不寻常的事情,故用不定冠词,unusual的词首音素是元音,故不定冠词用an. 后一空泛指任何一个不明飞行物,UFO词首音素是辅音,故不定冠词用a,选D.
考点:冠词
点评:冠词是一种虚词,一般用于名词前面表示特指或者泛指某一个。冠词的应用都用一定规则,熟记这些规则是解题的关键。不定冠词用在名词前,表示泛指任何一个。定冠词用在名词前表示特指某一个。在专有名词及表示泛指的复数名词前一般不要冠词,叫做零冠词。需注意的是不定冠词的用法是看词首音素,不是看首字母,如:useful首字母是元音,但是词首音素时辅音,故不定冠词用a;hour首字母是辅音,但是词首音素是元音,故用冠词an。
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