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We have proved great adventurers.but we have done the greatest march ever made i

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We have proved great adventurers.but we have done the greatest march ever made i

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

试题答案

答案：B

解析：

考查情态动词。needn’t have done意为“本来不必要做某事但做了”，shouldn’t have done意为“本不应该做某事”，must have done表肯定推测，只用于肯定句中。may not have done表示“也许没做某事”，用于对过去或已经发生的事进行推测。

标签：donewethemarchgreatest

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