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It is believed lifelong learning is a crucial response () the challenge of the global knowledge economy.

科目名称：人文英语3

试卷号：11379

题型：词汇与结构(单选题)

题目：It is believed lifelong learning is a crucial response () the challenge of the global knowledge economy.

选项：A. to B. of C. in

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答案：A. to

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