What is phonetics? (a) It is the study of how we write words in English. (b) It is the study of how people understand sentences. (c) It is the study of how many words the English language has. (d) It is the study of the sounds we make when we speak. 2. What are the different types of sounds used in English pronunciation? (a) Vowel sounds (b) Diphthong sounds (c) Consonant sounds (d) All of the above