this is a pear tree.改为复数
this is a pear tree.改为复数
This is a pear.改为复数句
this is a tree 改为复数句
This is a young tree.(改为复数)
this is a pear改为复数(要有some)
This is my book.(改为复数形式) There is a nice cat in the tree.(改为
It is a pear.(改为复数句子)
请问 That is a pear .改为复数形式
there is a pear in the bag改为复数式
This is my book.改为复数形式 There is a nice cat in the tree.改为复数形
pear tree的复数
this is an apple tree改为复数形式