题目详情
单选题 According to shape of the lips, English vowels can be classified into ______
A. open vowels and close vowels
B. front, central, and back vowels
C. rounded and unrounded vowels
D. monophthongs and diphthongs

学科:默认课程
时间:2025-06-18 09:04:42
相关题目
相关作业
