Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed
I am sure your parents are proud __________ you.
—Are you used to __________ in the north with the old couples? —Yes, I am glad to find out that coal is used __________ electricity for home use.
__________ be late for the first class, Bill took a taxi instead of riding to school that morning.
—Bob, are you free at the moment? I have to ask you some questions. — __________.
You are __________ to hand your paper in before the class is over.