

りんごの皮を剥くのが上手ですね。
みかんを剥いてあげようか?
じゃがいもの皮はもう剥きましたか。
"むく(剥く)" is in the lesson "Verbs 7" (Level 19), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.