This is a pen,and ____is a pencil over there

Is __ your pen A.that B.this C.her D.his.That is his pen. A:that's your pen.___ is my pen B:Do you __ this is interesting? This is a pen and ____ is a pencil. This is a pencil and a pen还是These are a pencil and a pen This is a pen,and ____is a pencil over there this is a red pen.and that is a green pen.（改为同义句） this is a red pen.and that is a___ ___. Is __ your pen ?That is his pen. A.that B.this C.her D.his.可以告诉我为什么?谢谢 this is a my pen This is a nice pen. there is a piece of paper,on it __ wordsthis is a penThere is a piece of paper,on it __ wordsthis is a penA is B are C was D were This is a pen.(this)are pencily IS this his pen?YES,__ ___.it's____. This is a pen and that’s an eraser.可不可以写成This is a pen and that is an eraser.呢? This is a pencil and a pen还是This are a pencil and a pen,二楼说的也许对，但我只问用IS还是ARE This is a pen and that is a knife改为复数形式 This a pen.that is a pen,什么 This is a pen.就划线提问 this is a pen.改为复数句