—Bob, look what you have done! You ruined the experiment.—It’s not my fault. I just carried out the instructions _____.
It was necessary to _____ the factory building as the company was doing more and more business.
. I asked the tailor to make a small _____ to my trousers because they were too long.
Because of the strong sun Mrs. William's new dining room curtains _____ from dark blue to gray within a year.
. Jack is good, kind, hard-working and intelligent. _____, I can't speak too highly of him.
Evidence obtained from observation and experiment is often used to _____ a scientific theory.