The experiment shows that proper amounts of exercise, if regularly, can improve our health.
―Why? Where is the key to the sound lab?―Dear me! You _______ it in the taxi!
―________ for Beijing?―Yes. And I’ll come back in three months.
―What were you doing when I called you yesterday afternoon?―I ________ my homework and I was starting to take a bath.
―Twenty dollars, please!― How terrible!―I ________ to bring my wallet with me.
―What’s the matter? You look worried and restless.―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon.