Concept:Identify the vowel sound in the underlined part of the given word, then find the option that shares the same vowel sound.
Explanation:The word given is “host”.
It is pronounced as /həʊst/.
The underlined vowel sound here is /əʊ/.
Now check each option:
“now” has the vowel sound /aʊ/.
“hoarse” has the vowel sound /ɔː/.
“thought” has the vowel sound /ɔː/.
“known” is pronounced /nəʊn/, containing the same vowel sound /əʊ/.
Therefore, the word that has the same vowel sound as the underlined sound in “host” is “known”.
Answer:D. known