a piece of paper 变为复数some ___ of _____

a piece of paper 变为复数some ___ of _____ a piece of paper a piece of paper 是什么意思 a piece of paper中文 a piece of paper money have a seat .a piece of paper . a piece 和a piece of paper有何区别? a piece of paper 的中文意思 a piece of paper的汉语意思 a piece of paper 求翻译急! a fresh piece of paper fresh同义词 a piece of paper可以用a paper吗?为什么? a piece of 哪些比如a piece of paper a piece of cake one piece of paper. That is a piece of paper.(改为否定句） That( )( )a piece of paper. a big piece of paper 和 a piece of big paper呢?哪个正确 a big piece of paper?还是 a piece of big paper? Please take out____,children.A.a piece of paper B.a piece paper C.some paper D.pieces of papers