500 câu trắc nghiệm tổng hợp Ngữ âm - âm vị học có đáp án - Phần 2
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. vowels are the ones in the production of which the lips are drawn together so that the opening between them is more or less round.

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... vowels are the ones in the production of which the lips are drawn together so that the opening between them is more or less round.

Rounded

Unrounded

Long

Short

Giải thích

Chọn đáp án A