This is a knee pad.改为复数形式
This is a box.改为复数形式
This is a pen.(改为复数形式)
this is a book改为复数形式
This is a cat.(改为复数形式)
Is this a bus?(改为复数形式) Those are erasers.(改为单复数形式)
This is a leaf.(改为复数形式)
This is a bus.改为复数形式的句子
what is this ?lt’s a sheep 改为复数形式
This is a key.(改为复数形式)
IS there a library near this supermarket[改为复数形式}
is this a car?改为复数形式怎么改?
This is a picture 改为复数形式是什么