That is a piece of paper.(改为否定句) That( )( )a piece of paper.
That is a piece of paper.(改为否定句) That( )( )a piece of paper.
a piece of paper
a piece of paper money
a piece of paper中文
a piece of paper 是什么意思
1.I have a piece of red paper.(改为否定句)
是a piece of paper 还是 a slice of paper
have a seat .a piece of paper .
I found a piece of paper on my desk that said "..."中的that sa
a piece 和a piece of paper有何区别?
a piece of paper 变为复数
a fresh piece of paper fresh同义词