One or perhaps more pages____missing.A.is B.are C.has been D.have been为什么?请详解.找出知识点给我.

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Oneorperhapsmorepages____missing.A.isB.areC.hasbeenD.havebeen为什么?请详解.找出知识点给我.Oneorperhapsmorepages__

One or perhaps more pages____missing.A.is B.are C.has been D.have been为什么?请详解.找出知识点给我.
One or perhaps more pages____missing.
A.is B.are C.has been D.have been
为什么?请详解.找出知识点给我.

One or perhaps more pages____missing.A.is B.are C.has been D.have been为什么?请详解.找出知识点给我.
主语是one,因为是OR
如果是and就用复数,主语就是one and more pages

or

这种情况谓语单复数应该跟前面的ONE一致,
不能用HAS BEEN MISSING 因为意思是讲不通,不可能是持续完成的动作