Concept:The question tests the ability to identify the same vowel sound in different words.
Explanation:The underlined vowel sound in "wolf" is /ʊ/, like the vowel in "put".
Now compare each option:
A. "golf" has the vowel sound /ɒ/ or /ɔː/, not /ʊ/.
B. "scold" has the vowel sound /oʊ/, not /ʊ/.
C. "crude" has the vowel sound /uː/, not /ʊ/.
D. "wood" has the vowel sound /ʊ/, which matches "wolf".
Therefore, the correct choice is "wood".
Answer:D. wood