Travel can not only relax us from the pressure of work for a while but ____ our knowledge of the world.

twelve o’clock, I think I must be offnow.” “Oh, reallyI ______ it at all.”

He has ____________ friends in the school.He is unhappy.

Just as the clothes a person wears , the food he eats and the friends with whom he spends his time, his house his personality.

____ has finished the task ahead of time will be rewarded, though we don’t know who it will be.