若き脳みそは鍛えられるであろう。

「3行目のusingの品詞は？働きは？文法的機能は？」と頭を悩ませているのだから。

その英語の問題。
The implications of this discovery attracted widespread attention in 1997, when Simon Esteal and colleagues at the Australian National University in Canberra made headlines by annoucing that according to their