--- Which would you like, milk or orange juice?--- is OK.
This is _____ bag. Those are my __________.
-----________ the girl in a purple hat? -----She is my sister Anna.
-----____, are you Mr. Wang? -----Yes, I am.
-----Is she Helen? -----__________. She is Gina.
-----Tony, ________ is my good friend, Harry. ----- Hello, Harry.