Professor Smith, many students want to see you. __________ they wait here or outside?
The cause he had devoted himself to __________a perfect success.
— Have you handed in your papers? —Yes, we have. I guess they ___________ now.
The company _______ a rise in salary for ages but nothing has happened yet.
—Why does the river smell terrible? —Because large quantities of water__________.
Months ago we sailed ten thousand miles across the open sea, which_____ the Pacific,and we met no storm.