3.-What do you think the noise was?　　--It ___________ a cat.　　A.may be       B.might be      C.could have been      D.might have beenD 为什么B不可以啊?

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3.-What do you think the noise was?　　--It ___________ a cat.　　A.may be       B.might be      C.could have been      D.might have been
D 为什么B不可以啊?

情态动词表推测时他们的过去式并不表示过去发生的事,情态动词对过去的推测的结构通常都是could/should/might+have done

What do you think What do you think of what do you think about what do you think of what do yu think you What do you think about what do you think i what do you think you do? DO YOU THINK WHAT YOU THINK YOU THINK怎么样 what about=what do you think what do you think?和what are you think about 是“what do you think”还是“how do you think”? what do yu think you arewhat do yu think you what do you think you are doing What do you think you are? what do you think you are like What do you think you're worth? What do you think interest you 改错