I found her ______ in thought.
—Madam, could you please tell me how to get to the nearest post office? —_______
Entering the room, I found Mary ______at the desk and ______a letter.
_________on the main street, the market was busy yesterday.
They were surprised that a child should work out the problem _____ they themselves couldn’t.
--- You must obey every word of mine. --- _____ I don’t?