This is a pen in English.对 a pen 划线提问

what is that in English?是It is a pen还是This si a pen还是That is a pen 连词成句：in,this,pen,a,English,is This is ( a pen) in English ? 对划线部分提问 This is (a pen ) in English(就括号部份提问) This is a new pen.( ) it in your pencil case This is a pen in English.对 a pen 划线提问 this is a my pen This is a nice pen. It is a pen in English.对a pen 划线提问,用What is this in English? what is this in English?It is a pen而不是It is a pen(英语)急what is this in English?It is a pen而不是It is pen(英语) This is a pen.(this)are pencily This a pen.that is a pen,什么 what's this in English?It's a pen.为什么不能说是this is a pen.?详细!this is 在哪能用?二者的区别是什么?谢谢啊! This is a pen.就划线提问 this is a pen.改为复数句 this is a pen改成一般疑问句 This is a pen.改为一般疑问句 is this a youe pen 怎样改错