there is a pen 对a 提问
there is a pen 对a 提问
there is a pen.对划线部分a pen提问
There is a pen on the desk.(对a pen 提问.)
there is a pen in the pencil box 对a提问
对划线部分提问 The letter is from a pen friend 对a pen friend提问
There is a book .对a提问
There is a pen in my pen.
This is ( a pen) in English ? 对划线部分提问
This is a pen.(对画线部分提问).
This is a pen.对划线部分提问 ___ ___?
This is a pen in English.对 a pen 划线提问
This is a white pen对其中a white pen提问