You gave me the stone without asking for anything 25 .
答案：(D) in return
【句型】in return 固定片語「作為回報」；on leave（休假中）、by surprise（出其不意）、off record（不公開的）都不合。
in return 與 in turn 長得像，很多人腦中把兩者混成一團；也有人看到 by surprise 覺得眼熟就順手選了。這一格要靠兩件事定案：一是語意，二是片語本身完不完整。
先讀懂前後的邏輯：前一句他說 I'm giving it back to you（我要把它還給你），這一句 You gave me the stone without asking for anything ______ 則是在回顧那女子當初的舉動——她把寶石給了他，卻沒有要求任何「回報」。in return 正是「作為回報」，剛好補上這個位置。還原驗算：She gave him the stone, but she did not ask him to give her anything in return.（她把寶石給了他，卻沒有要求他回報任何東西。）順便把兩個形近片語分開記：in return 是「作為回報」，in turn 是「依序、轉而」，兩者不能互換。
on leave（休假中）：講的是工作狀態，與這個情境無關。by surprise：這個片語不能單獨使用，它固定出現在 take somebody by surprise（使某人措手不及）這個結構裡（劍橋詞典 take somebody by surprise 詞條），把 take 拿掉就站不住。off record：正確的說法是 off the record（不可公開引述地），少了 the，這個片語本身就是錯的——遇到片語題，先檢查冠詞、介系詞有沒有缺，常常一眼就能刷掉一個選項。
in return（作為回報）、in return for something（作為對某事的回報）、in turn（依序、轉而）、ask for something（要求某物）、take somebody by surprise（使某人措手不及）、off the record（不可公開引述地）。
A wise woman traveling in the mountains found a precious stone. The next day she met another traveler who was hungry. The wise woman generously opened her bag to 21 her food with the traveler. When the hungry traveler saw the precious stone, he asked her to give it to him. The woman did 22 without hesitation. The traveler left, rejoicing.
If he sold the stone, he thought, he 23 enough money for the rest of his life. But in a few days he came back to find the woman. When he found her, he said, "I know how valuable this stone is, but I'm giving it back to you, 24 that you can give me something even more precious. You gave me the stone without asking for anything 25 . Please teach me what you have in your heart that makes you so generous."