一、阅读理解 阅读下列短文，从各题所给的四个选项(A、B、C和D)中，选出最佳选项。
1.
The year is 1947. Thirteen-year-old Carl Sagan is standing outside a small house in the eastern city of Brooklyn, New York. It is dark. He is looking up at the sky. After a few minutes, he finds the spot for which he has been searching. It is a light red color in the night sky. Carl is looking at the planet Mars.
