is this___your pencil case?A Yes,this is B no,it isn't C.

问题描述:

is this___your pencil case?A Yes,this is B no,it isn't C.
A 为什么错了 用this不行吗

你好,语法的规定是 用this 或者 that 这种指示代词提问的,回答都要用it,不能用this 或者that.
这是规定,记住就行了.