The experiment shows that proper amounts of exercise, if regularly, can improve our health.
—People often don't appreciate what they have, do they? —No, _________ they lose it.
— Where were you last night? We had a wonderful party. — Oh, ________ If you had called me, I wouldn’t have gone to the cinema.
The white building, ______ threats to pull it down, is now a private house in the possession of a retired professor.
Everyone doesn’t agree to the plan.Some support it while I’m one of ______ opposed to it.
The two friends ______ on line for three hours, and they will go on.