北京：英语四级翻译部分答案

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　　翻译参考答案

　　82.who have devoted their whole life to poetry

　　83.or she would/should have answered it /replied last week

　　84.have completed/finished her chemical experiment

　　85.have the old couple quarreled with each other

　　86.The prosperity of a nation in the future depends/relies, to a great extent, on