As a child, I was _________to keep quiet when my parents were discussing something, while parents nowadays often ask for their children’s opinions.
With the final exam drawing near, everybody feels ____________ well prepared for it.
____________ all his hard work, he still failed to finish the task in time.
It is because he ___________ science that I __________ what he says.
Mr. Smith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school.
While crossing the street, an old man was knocked down by a car and badly __________.