Answer:
At the bottom of a question there is a bell
Explanation:
If it is colored gray (I don't know if it is grey or gray) and has a checkmark in it, then you are following.
Click the bell to unfollow
If you had answered a question on a post then you cannot unfollow
The adverb that modified the verb (finished) is quickly.
Adverbs answer the question: HOW IS THE ACTION DONE?
So,
How did John finish his work?
He finished it quickly.