Is this a your pen?哪错了马上用啊

Is this your pen?--( ).---Is this your pen?A.pardon B your pardon c I beg is this a pen ___ your pencil case This is a new pen.( ) it in your pencil case This is _____（definite) a letter from your pen-friend Is this your pen Is this his pen?选择疑问句 This not is your pen,your pen is white.改错 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? Is this a your pen?哪错了马上用啊 what is this?this is a pen.哪错了? 连词成句：this ,your ,is ,pen ,. Is This your pen?No ,it's__________ Is this your pen?同义句转换 ______me,Tony.Is this your pen? Is this your pen怎么解释? Is this your pen 下一句是什么? E____me.Tim.Is this your pen? Is this your pen?Yes,___(thank).