是on paper还是on papers?

是on paper还是on papers? paper作纸时不可数吗?那为什么“在纸上”是on papers? writing on paper还是on the paper I can see ______ on the table.A.some paper B.a paper C.any papers D.some papers I need _____to write ____now A two papers in B two pieces of paper on C two paper on Dtwo pieces of paper in he laid the papers on my desk.on my desk是宾语补足语还是状语啊? I can see ______ on the table.A.some paper B.a paper C.any papers D.some 在纸上的英文是in the paper还是on the paper? in paper 和on paper的区别people can read books on Internet or on paper还是in paper write on the paper 还是write in the paper? I need tow ____ to write ____nowA papers ,in B pieces of paper ,onC paper ,on D pieces of paper ,in There two pieces of paper on the deskbe动词用is 还是are 是看piece还是paper 十张纸 是ten pieces of paper还是ten piece of papers? 是write on a paper还是write in a paper?我的老师讲的是in但是网上说是on高人指导下 I need a piece of paper to write on中的to write on是做状语还是定语? please write down your ( ) (地址)on the paper,children.是address还是addresses?快回答, Don't throw paper on the ground的答语 是sorry还是that is all right 请问两张纸是pieces of paper还是pieces of papers