TOEIC Part 5 練習問題 P5_209
The merger negotiations were conducted ------- the utmost confidentiality to prevent media leaks.
✅ 正解：with
✅ 正解根拠:with + 抽象名詞で「〜をもって」の意味。with confidentiality(秘密厳守で)は定型。
🎯 秒解きポイント:with + 抽象名詞 = 副詞のように働く(with care = carefully)。
⚠️ ひっかけ:in confidence なら成立するが in confidentiality は不自然。with + 抽象名詞のパターンを覚える。
📚 語彙:同パターン: with care / with caution / with ease / with pleasure。