. --- Do you mind if I open the window ? It’s hot in here. --- ______________________
--You have been to Shanghai, haven’t you? --_______. I have only been to Nanjing. I plan to visit it this summer.
--Who is knocking at the door? -It ______ be Mr. Wang. He always knocks at the door so loudly.
-Which do you like, tea or coffee? -______. I’d like some water.
–Is this radio _______? --No, it belongs to _______.
-What does your mother do? -She is ____ English teacher in ___ university in Shanghai.