Question

まんまる

What sport do those boys play?が
正解なのですが、
What do those boys play?では
間違いですか？

疑問詞

Answer 1

✨ คำตอบที่ดีที่สุด ✨

辞めます

sportが入ってるか入ってないかではこんな感じの差があります…

まんまる

分かりやすい解説、ありがとうございます！

Answer 2

Answer

It hasn’t any wrong in this two sentence, but you should focus on the timing.
If you have no idea what do they play, you should use the below. If you understand they are playing some ball games, then you should use the above.
Moreover, if you focus on what do they choose, you can using ‘which sport...’