This is a pen.（改为一般疑问句）_____ _____a pen

This is a pen.改为一般疑问句 this is a red pen怎样改为一般疑问句 This is a pen.（改为一般疑问句）_____ _____a pen it is a pen(改为一般疑问句) this is a pen.改为复数句 This is a pen.(改为复数形式) this is a pen改成一般疑问句 This is my blue pen.(改为一般疑问句）()this () blue pen?This is a white key.(对划线部分提问)()()this? This is a pen改为否定句,改为单复数转换改为一般疑问句或提问,肯定句做回答. this is his green pen 改为一般疑问句 those are her keys 改为一般疑问句 This is her pen.(改为同义句) She is interested in drawing.(改为一般疑问句) There is a pen in my bag.【改为一般疑问句】 This is a desk.(改为一般疑问句) This is a ruler 改为一般疑问句 this is a pencil 改为一般疑问句 This is a computer.(改为一般疑问句) This is a key改为一般疑问句? This is a ruler改为一般疑问句