This is a pen( )that is a pencil.填空,填and或but.请问要填哪一个啊?是“和”还是“但是”?纠结~

This a pen.that is a pen,什么 what is that in English?是It is a pen还是This si a pen还是That is a pen Is __ your pen A.that B.this C.her D.his.That is his pen. that is a pen 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___ ___. A:that's your pen.___ is my pen B:Do you __ this is interesting? this is a my pen This is a nice pen. 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 pen is 20 yuan.That pen is 200 yuan.= This pen is much less expensive than that pen. what's_?__a pen ?a 、this;this is b 、this;it's c 、 that;that's d、 that' This is a pen.(this)are pencily It is clear that this is a pen?有语法错误么关键是 this is a pen是否够资格做that的从句 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 pen is ________and that is ________ pen.A.mine,hers B.my,her C.my,hers D.mine,her This is a pen and that is a knife改为复数形式 怎样改错啊 This is a key,that is a pen Is （）your pen?No,（）isn't.it's（）pen A.this.this.hIs （）your pen?No,（）isn't.it's（）penA.this.this.hisB.this.it.hisC.this.it.myD.that.that.his