どちら /dot͡ɕiɾa/ DeterminerEnglishwhichFrançaislequel / qui / queExampleINLINE SYNONYMY: どちらの書物(どれ/どの)を今読んでいますか? — of: Which book are you reading?Which book are you reading?選択肢が明確な場合に「どちらの」が自然です。