Vilanova's been working ___ a coach for many years.

• A. As
• B. Like
• C. At
• D. In

Answer: (A)

Using as to express the role someone has is the natural choice here. When we describe a job with a present perfect continuous verb form like "has been working," we pair it with "as" to name the occupation the person holds. "As a coach" specifies the function Vilanova fills, and the phrase "for many years" signals a long duration that fits with ongoing action started in the past and continuing now. The other prepositions don’t work for naming a job: "like" would be a comparison, not a job label; "at" points to a place or organization; "in" can refer to a field or area, but with a specific job we usually use "as." So the sentence that sounds natural and correct is: Vilanova's been working as a coach for many years.