I owe a ______ of thanks to George because his support helped me overcome that difficulty.
问题描述：
I owe a ______ of thanks to George because his support helped me overcome that difficulty.
A. respectb, responsibilityc, dutyd, debt
答案是D, 重点是为什么?a debt of 是什么意思?
答
a debt of 字面意思是“.的债务”,意指必须要落实,要去还的“情”,即“感谢对方”,因为对方帮助过他