题目内容
Choose letter combinations that can be pronounced as /ʊə/ in English words.
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/ɪə/, /eə/, /ʊə/ are cenring diphthongs because they all glide towards /ə/.
There are many letter combinations that can be pronounced as /eə/, such as are, ar, air, are, ear, etc.
Diphthongs are sounds which consist of a movement or glide from one vowel to another, and the shape of the mouth makes changes from the beginning of the sound to the end.
There are 3 centring diphthongs in English, and they are /ɪə/, /eə/, /ʊə/.
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