His illness ________ his absence.
―Was the doctor there when you arrived? ―Yes, but he ______ out a moment later.
―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.