A simple 45-minute operation __________ by scientists is hoped to cure blindness in six years.
All her energies are ________ upon her children and she seems to have little time for anything else.
-Brad was Jane’s brother! —________ he reminded me so much of Jane!
In recent years________global warming is becoming ________ concern for people all over the world.
—What made the boy ________ in his classroom? —His hard work and wisdom.
Generally speaking,the limits of a person’s intelligence are fixed at birth,but whether or not he reaches those limits will ________ his environment.