There are ___ pure vowels or monophthongs and __ diphthongs or vowel glides in English RP.A10, 10B12, 8C8, 12D14, 6Answer: B. 12, 8 Read Explanation: In Received Pronunciation (RP) English:There are 12 pure vowels (monophthongs) — these are single, steady vowel sounds.There are 8 diphthongs (vowel glides) — these are sounds where the tongue glides from one vowel position toward another within a single syllable. Read more in App