It is not polite to enter others’ rooms knocking on the door. A. by B. with C. without
You ______ to the party if you’re so busy.
—_____I use your dictionary, Tom? —Of course, you _______
Simon improved his way of study. ________, he has made great progress.
—What color is _______ orange? —It's____ orange.
---What did you discuss just now? ---We discussed .