( 一)
Einstein was born in 1879 in Germany. As a child, he was slow ___1__ (learn) to talk. As a pupil, he was backward. ___2__ when he was fourteen years old, he became clever. He ___3__ (teach) himself maths from textbooks. He studied hard because he wanted to be a ___4__ (physic).
In 1901, Einstein began teaching. In 1902 he continued his studies at the University of Zurich. Several years later, he formulated(系统地阐述) his famous Theory of Relativity(相对论).To most people the law of relativity is ___5__ (difficulty) to explain. But once Einstein explained ___6__ very well to a group of young students. He said,___7__ you sit with a good girl for two hours, you think it is only a minute. But when you sit ___8__ a hot stove for a minute, you think its two hours. That is relativity.
___9__ Hitler came into power in Germany, Einstein went to America. In 1940 Einstein became ___10__ American citizen. In 1955, Einsteins life ended at the age of seventy-six.
( 二)
Atomic(原子的) energy is a great discovery of the present century, and many people have played a part in its development. Albert Einstein told the world about ___1__ basic idea in his famous Theory of Relativity in 1905. As he and ___2__ scientists began to discover more about the atom, they learned that a great amount of energy could be released(释放) by splitting(分裂) ___3__ atom. ___4__, it was also necessary that this energy be controlled. ___5__ it were not, it would be very dangerous.