Our English teacher _____ in the office because she has gone to America.
-My father with my grandparents _______ Shanghai. -Really? _______ will they come back?
-Your mother _______ take a bus to work? -Yes. But now she usually goes to work on foot.
-When _______ your mother _______ you that blue dress, Mary? -Sorry, I really can't remember.
You can't watch TV _______ you finish your homework.
They were _______ busy _______ with each other to remember the time.