题目内容
Sound discrimination. Listen carefully and choose the phrase you hear.
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In English, there are five closing diphthongs and _______ centring diphthongs. （在空格处填入英文数字,而且要求用纯小写英文字母。）
Diphthongs are sounds which consist of a movement or glide from one ________ to another.（要求用纯小写英文字母填写答案。）
/eɪ/ is a closing diphthong and /ɪə/ is a centring diphthong.
Our mouth shape makes changes when we pronounce diphthongs.
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