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First, fix a very sharp piece of metal, a foot or so above the frame. [ ] A.poin

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First, fix a very sharp piece of metal, a foot or so above the frame. [ ] A.poin

First, fix a very sharp piece of metal, _______ a foot or so above the frame.

[]

A.pointedB.and pointedC.and pointingD.pointing

试题答案

答案:D

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