We__________have proved great adventurers,but we have done the greatest march ever made in the past ten years.A.needn'tB.may notC.shouldn'tD.mustn't

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

参考解析

解析:考情点拨:本题考查情态动词一应试指导:句意:我们也许没有被证明是伟大的探险家,不过我们的前进是过去十年来最伟大的。“may not+现在完成时”表示“也许没有”,用于对过去或已经发生的事进行猜测。“needn’t+现在完成时”表示“本来没有必要”,表示过去不需要做某事:“shouldn’t+现在完成时”表示“本来不应该做而做了某事”。mustn’t不与现在完成时连用,只与动词原形连用,表示“禁止,不要”。

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