第一部分 阅读理解(共两节，满分40分)
第一节(共15小题；每小题2分，满分30分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A
Much of today’s science of physics is based on Newton’s discovery of the three laws of motion and his theory of gravity.Newton also developed one of the most powerful tools of math，called calculus.Newton said，“If I saw further than other men，it was because I stood on the shoulders of giants.”One was the great Italian scientist，Galileo.Another was the Polish scientist Nicholas Copernicus，who had begun a scientific revolution.It led to a completely new understanding of how the universe worked.Galileo continued and expanded the work of Copernicus.Newton built_on the ideas of these two scientists and others.He found and proved the answers for which they searched.
