Concept:Identify the option whose underlined vowel sound is the same as the underlined vowel sound in “doubt”.
Explanation:In “doubt”, the letters “ou” produce the diphthong sound
/au/, as in the pronunciation
/daut/.
Now compare the vowel sound in each option:
Option A: “nought” is pronounced
/no:t/, so its vowel sound is
/o:/, which does not match
/au/.
Option B: “round” is pronounced
/raund/, and it contains the same diphthong
/aυ/.
Option C: “rough” is pronounced
/r^f/, so its vowel sound is
/v/, which is different from
/au/.
Option D: “drove” is pronounced
/drouv/, giving the vowel sound
/ou/, which is not the same as
/aʊ/.
Therefore, the word that shares the identical vowel sound with “doubt” is “round”.
Answer:B. round