问题
选择题
We _____ have proved great adventurers, but we have done the greatest march ever made in the past ten years.
A. needn't
B. may not
C. shouldn't
D. mustn't
答案
答案：B
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We _____ have proved great adventurers, but we have done the greatest march ever made in the past ten years.
A. needn't
B. may not
C. shouldn't
D. mustn't
答案：B
