. You have must practiced speaking English for a long time before the contest is held, ________?
Although she did not know Boston well, she made her way __________ to the Home Circle Building.
Although he knows clearly that smoking harms his health, he simply cannot __________.
There is no doubt that by recycling textbooks, the cost of books will be __________ greatly.
I agree with most of what you said, but I don't agree with __________.
—Do you know the man __________ is talking with your father? —Yes, he's our headmaster.