( )60. Arthur Ashe ________.

　　A. won Olympic gold medals in tennis

　　B. took part in several Olympic Games

　　C. was a famous sportsman in the Olympic Games which was held in South Africa

　　D. had not been in any Olympic games

　　( )61. ________ made Ashe happier than anything else.

　　A. Nelson Mandela‘s freedom

　　B. Winning the Australian US open titles

　　C. Juan Antonio Samaranch‘ s congratulation

　　D. His good days in his life

　　( )62. Which is correct?

　　A. There were as many good days in his life as bad days.

　　B. His good days were equal to his bad days.

　　C. He had more good days in all his life than bad days.

　　D. He had six good days in all his life.

　　D

　　For some time past， it has been widely accepted that babies—and other creatures—learn to do things because certain acts lead to “rewards”， there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards， at least in the early time， had to be directly connected to such basic physiological “drives” as thirst or hunger. In other words， a baby would learn if he needed food or drink or some sort of physical comfort， not otherwise.