There are some [ ] on teacher's table 1.pieces of papers 2.papers 3.pieces of paper4.piece of papeers

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There are some [ ] on teacher's table 1.pieces of papers 2.papers 3.pieces of paper4.piece of papeers

There are some [ ] on teacher's table 1.pieces of papers 2.papers 3.pieces of paper4.piece of papeers
There are some [ ] on teacher's table 1.pieces of papers 2.papers 3.pieces of paper
4.piece of papeers

There are some [ ] on teacher's table 1.pieces of papers 2.papers 3.pieces of paper4.piece of papeers
paper 纸,是不可数的
但是 piece 是可数的
一张 a piece of
三张 three pieces of
几张纸:some pieces of paper
因此选 3