80.The couple are trying hard to save their broken marriagetheir children.

A. on accountof

B.in thefront of

C. forthe sake of

D. regardlessof

正确答案：C

解析：

80.【翻译】为了孩子，这对夫妇在努力挽救他们破碎的婚姻【精析】C on account of：由于；in the front of：在前面，表示在事物内部的前面;for the sake of：为了；regardless of:不管，不顾根据句意可知，选C

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