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Help the overconfident applicant finish their cover letter by selecting the best word for each gap.
I started my career as a professional cat-petter ten years _________________________. I have been petting felines professionally _________________________ a decade, and I consider myself an absolute expert. In fact, I have not been scratched by a single cat _________________________ 2015!
I started my career as a professional cat-petter ten years ago. I have been petting felines professionally for a decade... I have not been scratched by a single cat since 2015!
Use ago to talk about a time in the past measured from the present (ten years ago).
Use for to express the length of time an action has lasted (for a decade).
Use since to identify the exact moment an action started (since 2015).