The number of workers _______________2000.
Evidence obtained from observation and experiment is often used to _____ a scientific theory.
Jack is good, kind, hard-working and intelligent. _____, I can't speak too highly of him.
Because of the strong sun Mrs. William's new dining room curtains _____ from dark blue to gray within a year.
I asked the tailor to make a small _____ to my trousers because they were too long.
It was necessary to _____ the factory building as the company was doing more and more business.