Silk（）by Chinese for thousands of years now.Ahas usedBhas been usedCwas usedDis used
Silk（）by Chinese for thousands of years now.
Ahas used
Bhas been used
Cwas used
Dis used
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—Have you ___________ drinking?—Not yet. A.been used forB.got used forC.been used toD.got used to
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