This is a baseball.(对划线部分提问)
This is your baseball bat.(对划线部分提问)对划线部分是your
this is a yellow ruler.(对划线部分提问)
This is a key.(对划线部分提问)
This is a key.(对划线部分提问)
My baseball is under the chair对划线部分提问
This is a book about Shanghai.(对划线部分提问)划线部分:about Shanghai
This is a book 对划线部分提问 (划线部分 BOOK)大神们帮帮忙
this is a school对a school划线部分提问
This is ( a pen) in English ? 对划线部分提问
This is a map ――对划线部分提问
This is a ruler.(对划线部分提问)
This is a red ruler对划线部分提问