Concept:The question tests the ability to identify identical vowel sounds in different words, not the spelling pattern.
Explanation:The underlined letter(s) in the question represent the vowel sound /ɒ/.
Now examine each word by its pronunciation.
Option A, tune, has the vowel sound /uː/.
Option B, hoof, has the vowel sound /uː/ or /ʊ/, not /ɒ/.
Option C, tough, has the vowel sound /ʌ/.
Option D, doff, is pronounced /dɒf/, so it has the same vowel sound as the underlined letters.
Therefore, the word that contains the matching vowel sound is doff.
Answer:D. doff