Generally it is ____ bad manners to blow your nose at ____ table or spit (吐痰) in ____ public places.
I don’t know how he made his money _______. I only know now he is really rich.
In some countries, many students participate in various programs, _______ they learn about the sense of responsibility by volunteering their services.
The hotel was terrible, and not at all what we _______ to expect in the advertisement.
Mom told him he was forbidden to watch TV for a month. _______, he stormed out of the room.
— Can I go now, sir? — If you _______ leave, do it quietly.