能详细点最好:,And what`s this?This is a pencil sharpener.能详细点最好:,And what`s this?This is a pencil sharpener..Is this your an English book?Is this a car?Yes,it`s.是三道改错的题目.

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能详细点最好:,And what`s this?This is a pencil sharpener.能详细点最好:,And what`s this?This is a pencil sharpener..Is this your an English book?Is this a car?Yes,it`s.是三道改错的题目.
能详细点最好:,And what`s this?This is a pencil sharpener.
能详细点最好:,And what`s this?This is a pencil sharpener..Is this your an English book?Is this a car?Yes,it`s.是三道改错的题目.

能详细点最好:,And what`s this?This is a pencil sharpener.能详细点最好:,And what`s this?This is a pencil sharpener..Is this your an English book?Is this a car?Yes,it`s.是三道改错的题目.
1. it's a pencil sharpener
2.去掉an
3.this----it

1.回答应该说It's a ...是为了避免重复,因为前面有一个this了
2.Ia this your English book?或Is this an English book?因为物主代词跟冠词不能一起用。
3.回答应说Yes,it is. 一般疑问句的肯定回答必须分开写,否定回答才可以简写。