I took ____ tennis again at the beginning of this year. A. on B. up I checked the dictionary, and it looks like both “take on” and “take up” can mean similar things. Can I say “take on” is generally used for people, whereas “take up” is for challenges? Is the answer B? Thanks Definitions: 1. Take on Someone -- to compete against someone or start a fight with someone, especially someone bigger or better than you: 2. Take up the challenge/gauntlet -- Rick took up the challenge and cycled the 250 mile route alone.