It is believed lifelong learning is a crucial response __ the challenge of the global knowledge economy.
A. to
B. of
C. in


答案地址：人文英语3综合测试答案

It is believed lifelong learning is a crucial response __ the challenge of the global knowledge economy.
A. to
B. of
C. in


答案地址：人文英语3综合测试答案