A sheet of paper.paper用的是单数,如果Two sheets of paper.这个paper也用单
A sheet of paper.paper用的是单数,如果Two sheets of paper.这个paper也用单
a double sheet of paper.
a separate sheet of paper的意思
a double sheet of paper怎么理解
a sheet of paper和a piece of paper的区别?
是a piece of paper 还是 a slice of paper
two kinks of paper ...谓语动词用单数还是复数?
a piece of paper
请问:a piece of paper和a sheet of paper有区别吗?
we,that is,the two sides of a sheet of paper,how can we sepa
a piece of paper可以用a paper吗?为什么?
PAPER