---- Wasn’t it Dr. Wang who spoke to you just now?---- ____.
_______ the sun rising slowly in the east, the scene is a perfect dream.
______ for something, a receipt is given to you.
_______ a pair of compasses, it is easy to describe a circle.
“May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.”
But for the help you gave me, I _______ the examinations.