单选题 Seldom ＿＿＿＿＿＿＿＿＿＿ any mistake during my past fifteen years of service here. 的答案

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题目内容：
Seldom ＿＿＿＿＿＿＿＿＿＿ any mistake during my past fifteen years of service here.
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