突然ですが、問題です。

https://translate.google.co.jp/?hl=ja&sl=zh-TW&tl=ko&text=%E5%9B%A0%E7%89%B9%E7%B6%B2&op=translate

This is not a piece of advice to you I'm talking to myself for my practice of writing skills. as I have hadn't answered this question, I asked comeback for this problem during intermission of waiting for next problem.

This is not a piece of advice to you I'm talking to myself for my practice of writing skills. we can communicate with, real or virtual, all over the world using (①finger,②head,③hand) ⑤through ④environment (①keyboard,②computer,③mouse).this problem is the best for my brain activating. thank you very much again. I'm sorry as I'm in the middle of excluding JL I can't reply in JL.