单选题

　　Classification of vowels is made up of the following EXCEPT( ) A the position of the tongue B the openness of the mouth C the shape of the lip D the width of the vowels

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　　正确答案：D

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　　[华图教育题目解析]：英语元音有四种分类：the position of the tongue in the mouth;the openness of the mouth,the shape of the lip;the length of the vowels。