It’s quite a time _____ Liu Xiang was injured in the foot, but we are sure it won’t be long _____ he returns to the track.
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.
Political parties often differ in their views on various _____ concerning their own countries.
_____ his knowledge of the mountainous country, John Smith was appointed as our guide.