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-This is a useful dictionary, I think. -...

-This is a useful dictionary, I think.

-So it is, and it’s ______ unusual one.

A. the        B. an C. a   D. 不填

 

B 【解析】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。句意:我认为这是一本有用的词典——确实是,它是一本与众不同的词典。结合语境可知下文泛指任何一本与众不同的词典。故用不定冠词。Unusual词首音素是元音,故不定冠词用an,选B。 考点:冠词
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1.词数90左右。短文的开头已为你写好,不计入总词数;

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参考词汇: 水平、标准standard  n.; 观点、看法opinion

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