One day, my father and I were in line to buy tickets for the circus(马戏表演). And a family was standing in front of us.

    The family had eight children. Their clothes were not expensive but clean．The children talked about the clowns(小 丑), elephants, monkeys and other things excitedly. It was their first time to go to the circus.

    The ticket lady asked the father how many tickets he wanted. He proudly answered, “I want eight children's tickets and two adults' tickets, so I can take my family to the circus.”

    The ticket lady said the price. The man's wife lowered her head and there was no smile on th e man's face. He quietly asked, “How much did you say?”

    The ticket lady said the price again. The man didn't have enough money. How could he tell his eight kids the bad news? My dad put his hand into his pocket and pulled out a $20 bill and dropped it on the ground．(In fact, we were not rich!) Then my dad said, “Excuse me, sir, this dropped out of your pocket.”

    The man knew what was going on. He looked into my dad's eyes, held my dad's hand in his, and took the $20 bill. “Thank you, sir, thank you. This really means a lot to me and my family.”

    My father and I went back home. We didn't go to see the circus that night, but we didn't care.

任务型阅读

____

    Sleep, as we know, is important to us because it helps restore tired organs and tissues in our body. But how much sleep do we actually need?

____

    For most of us, eight hours seems to be about the right amount. Yet we know that there are a great many people who get along perfectly with less sleep and some who may even need more. A great deal depends on the way we live. But a good general rule to follow is to sleep as long as we have to in order to feel happy and be able to work at our best when we are awake.

____

    There are actually different levels of sleep. There is a deep sleep and a shallow sleep. In a shallow sleep our body does not get the same kind of rest as it gets in a deep sleep, so that after eight hours of a shallow sleep we may still feel tired. But a short deep sleep can be very restful.

____

    Alexander the Great was able to get a deep sleep whenever he needed it. Once, during the night before an important battle, he remained awake longer than anyone else. Then he wrapped himself in a cloak and lay down on the earth. He slept so deeply that his generals had to wake him three times to give command to attack!

____

    Normally when we go to sleep, our “ sleep center” blocks off nerves so that both our brain and our body go to sleep. One prevents us form wanting to do anything and the other makes our internal organs and limbs go to sleep. But someone will fall asleep (brain sleep) and keep on marching, because his body is not asleep!

    The following is a selection of the 2017 summer programs offered at colleges and universities around the world．