Dialogue: W: So, what do you usually do in your free time? M: At the moment I'm spending much of my free time learning German. I also enjoy playing the piano. W: Do you play any sports? M: Not much. But I go to the sports club and work out once a week. Question: What does the man mainly do in his spare time? - Learn a language. - Do some sports. - Play the piano.
The answer to this question is:
Learn a language.