Listen to the word and decide which vowel sound you hear.
You will hear one word from a pair of words. Listen carefully and choose the vowel sound you hear. The word will not be shown until you answer.
/ʌ/ is the vowel sound in bud, bun and shut.
/ɜ:/ is the vowel sound in bird, burn and shirt.
Listen for the difference in the vowel sound rather than concentrating on the spelling.