He is dull ____ hearing.

Option B, "of," is the correct answer. The sentence is incomplete and needs a preposition to make sense. "Dull" means boring or uninteresting, and "hearing" refers to the sense of hearing. The correct preposition to use with "dull" and "hearing" is "of," which indicates possession or association. Therefore, the complete sentence is "He is dull of hearing," meaning that he has difficulty hearing or is hard of hearing. Option A, "off," is incorrect because it does not make sense in the context of the sentence. "Off" can be used as a preposition to indicate movement away from something, but it does not fit with the meaning of the sentence. Option C, "at," is also incorrect because it does not fit with the meaning of the sentence. "At" is a preposition used to indicate a specific location or time, and it does not make sense in relation to "dull" and "hearing." Option D, "in," is incorrect because it does not fit with the meaning of the sentence. "In" is a preposition used to indicate location or position within a space, and it does not make sense in relation to "dull" and "hearing."
Generative