Go back to the text and re-read a passage where Watson made a discovery. If Sherlock praises him, you've got your answer. I'm sorry if this wasn't much help, but I don't have any text to go off of.
Well it is not stop listening, or make an effort too attend, I am sure that assign meaning is correct.
Answer:
In to
Explanation:
"Listening in" is a phrase used when you are turning on something, in some way, to listen to audio. So, you would be listening in to Timmy Turner's radio show.
Off-topic: Isn't Timmy Turner that one character from Fairy OddParents?
Swam quickly, swam slowly, swam gently
