Question

(2006·天津)

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

Answer 1

答案：B
解析：

句意："我们或许还没有证明是伟大的探险者，但我们已取得了在过去的10年里的最伟大的进展。"故应用may not。