题目内容

12．I don't know who invented _______ telephone，it's really _______ most useful invention．（　　）
A．the； aB．the； theC．a； aD．不填；不填

分析 我不知道谁发明了电话，它真是最有用的一项发明．

解答 答案：A
句中the telephone表示类指，要用定冠词来限定；a most useful invention表示有用的一项发明，most表示程度，修饰useful，不是最高级；表示泛指一个，要用不定冠词来限定．故选A．

点评 冠词是一种虚词，本身不能独立使用，只能放在名词前帮助说明名词所指的人或事物，它是英语词性中最小的一类，只有三个，一种是不定冠词a，an；一种是定冠词the．此外也有些特定场合不用冠词，即通常所称的零冠词．不定冠词表示泛指，定冠词表示特指．

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