---Do you spend a lot of time______ computer?
---No, but I spend much time______ doing my homework.
--- What do you know about that strange sign?
--- You may ask Mr Smith for ________ about it.
-His French is very good.Can you tell me who taught him?
-Nobody.He taught ________.
-Would you like to have supper with me?
-________.
-----Do you speak Korean?
-----________.
--Shall we go to the Great Wall?
--Sorry, ________ I'm busy.
--Hello! May I ________ Mary please?
--Mary ________.
---____ is your mother?
---She is very well.
---Can you catch what I said?
---Sorry, I can ______ understand it.
—Please tell me what Ii Ming looks like?
— .