A long time _________ a person, which is really a truth.
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.
What I should do is ________ the task soon.
Very generally,grammar is ________ with the relations between words in sentences.