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【题目】Baicizhan(百词斩)is useful app to learn English words.

A.aB.anC.the

【答案】A

【解析】

句意:百词斩是一款有用的学习英语单词的程序。

考查冠词。不定冠词a/an用于单数可数名词前表泛指,a用于以辅音音素开头的名词前,an用于以元音音素开头的名词前;定冠词the表特指;从文字的表层意思推断空格指一款有用的程序”——表泛指,所以,空格用不定冠词;useful以辅音音素开头,不定冠词用a;故选A

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