Some pieces of paper应该用什么代替,it 还是them

Some pieces of paper应该用什么代替,it 还是them some pieces of paper 前面是are 还是is Write them （ ）on pieces of paper There ___(be) some pieces of paper. 请问两张纸是pieces of paper还是pieces of papers 英语翻译There are some pieces of paper.或者是I have.应该怎么说?：） 不可数名词用什么代替,用them还是it There ( )some good pieces of news in today' s paper.括号里是is还是 write them on pieces of paper 为什么介词用on啊? they made some planes out of pieces of paper. 不可数名词用it还是them代替 are there _____(some)pieces of paper on the desk?