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2.“Until recent times unknown to man” in paragraph I means that _________.
A. no man has been to the Antarctica recently
B. we knew nothing about this large continent till that time
C. a great landmass is still not known to man till today
D. our knowledge of Antarctica was very limited at the time this article was written

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出自：新疆师范大学2021级学生第一学期结业课程考试《大学英语》

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