it is an eraser的复数形式!helpit is an eraserThis is my pencilIs that a photo of mineShe is our teacherIs this book on the desk
问题描述：
it is an eraser的复数形式!help
it is an eraser
This is my pencil
Is that a photo of mine
She is our teacher
Is this book on the desk
答
they are erasers.
these are my pencils.
are those photos of mine?
they are our teachers.
are these books on the desk.