This is a key.(变成一般疑问句,并作否定回答）

This is a key改为一般疑问句? This is a key.(变成一般疑问句,并作否定回答） This is a book变成一般疑问句 this is a clock变成一般疑问句 this is his key 改为一般疑问句 This is my key.改为一般疑问句! This is his key改一般问句 this is a black car.变成一般疑问句 This is a key.(变为复数) 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 white key 的提问This is a white key ,对“a white key 进行提问 what's this?A this is key B it's key应该选几 This is my teacher变成一般疑问句.He is from the U.S.A.变为复数 This is a key.（对划线部分提问）划线部分：a key._______ ________this? This is a key.a key画横线 对划线部分提问 This is a key in Engelish.(对划线部分提问)a key是划线句 连词成句英语is,in,a,English,key,this This is a key to my door.(翻译)