Which vowel is different from the others according to the characteristics of vowels?

A.[i:]
B.[u]
C.[e]
D.[i]
出自:信阳师范学院-英语语言学

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块