—Don't you know that a proper amount of exercise a day will ________ to a person's health?—No wonder so many senior citizens do exercise in the square.
My dog made a mess in the living room, ______ really annoyed me.
They made a great effort to prepare the exhibition, ______ to achieve a big success.
It is still unclear ______ the little boy got the CD player to work.
—Ring me at six tomorrow morning, will you? —Why that early? I ____.
She tried two different methods, yet ______ of them seemed to work very well.