Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company .
She reached the top of the hill and stopped ________ on a big rock by the side of the path.
In some parts of London, missing a bus means ________ for another hour.
—The light in the office is still on. —Oh,I forgot ________.
—You were brave enough to raise objection at the meeting. —Well, now I regret ________ that.
-----Has any of you reached the Great Wall ? -----__________.