that is a pen

that is a pen This a pen.that is a pen,什么 you should draw with pen,that is,in a pen That is a pen.(变为复数) that is a pen (变为复数） Is that a pen?的同意句 that is a pen.改成一般疑问句 Is __ your pen ?That is his pen. A.that B.this C.her D.his. that is a pen /that is the pen有什么区别? That is green pen That is your pen that is your pen.