—She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.
The number of tickets _____ will be determined by the size of the stadium.
According to the psychoanalyst Sigmund Freud, wisdom comes from the _____ of maturity.
. My camera can be _____ to take pictures in cloudy or sunny conditions.
This is the _____ piano on which the composer created some of his greatest works.
Mr. Smith gradually _____ a knowledge of the subject.