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1 Let's move the stone away,or there-----an accident A may h

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1 Let's move the stone away,or there-----an accident A may have Bmay be A不可以吗?2,I didn't see her in the meeting room this morning.She-----at the meeting A mustn't have spoke B.shouldn't have C needn't have spoken D couldn't have spoken 3,John-----his father about this failureth in the exam dares not tell B dare nor rall dare做情态东为什么不加s.
1 Let's move the stone away,or there-----an accident A may h
/>there may have 可以理解为在之前已经有事故了 所以另外一个答案更加好

AC可以直接排除 must是必须,我今天没有在早会上看见她,她必须不在哪里;很明显意思上不成立. 
need 需要,翻译过来就是她不需要说话,早会没有看见她和她没有需要说话没有联系/
B shouldm't have 这里是不是同样有spoke?漏了写吧...
shouldn't意思理解为她不应该,翻译过来就是她不应该在会上说过话,和前面早会没有看见她同样是没有逻辑的,排除/
D couldn't have spoken 首先这里必须用spoken,spoke是肯定不对的,因为这个是完全过去式.然后从意思理解上来说,我早会没有看见她,所以她不可能在早会上发言.逻辑上是成立的.

dare不加s是因为这件事情已经发生了,肯定是出了成绩之后,John才不敢告诉他爸爸.dares用于一般现在时,而不是过去时.

看在我这么认真回答~记得要采纳我哦!