—Thank you very much. —It’s a piece of cake compared to your saving my life: I am forever

问题补充：

—Thank you very much.

—It’s a piece of cake compared to your saving my life: I am forever .

A. in your debt

B. in debt

C. getting into debt

D. remembering you

答案：

(答案→)A. in your debt

B. in debt

C. getting into debt

D. remembering you

解析：考查固定搭配。in one’s debt欠某人的恩惠/情分；in debt有债务；get into debt欠债；句意：—非常感谢你。—和你救了我的命相比较，这是小事一桩。我永远都欠你的恩惠。根据句意说明A正确。