摘要：9．Since his retirement.having a walk along the river after supper has become part of his daily . A．tradition B．custom C．convention D．routine 答案与解析:D 每天晚饭后沿着河边散步对他而言已是惯例.routine“常规.惯例 .tradition“传统 ,custom“习惯,风俗 ,convention“协定,约定 .

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