Questions 31-33 Moons are natural satellites that orbit around planets. They come in various sizes and shapes.
Earth’s moon is the fifth largest moon in the solar system and is our closest neighbor in space. It has a
rocky surface with large craters and also flat plains. Many planets have moons. For example, Jupiter has
more than 70 moons, and Saturn has around 80. Some moons, like Europa and Ganymede, are very
interesting because they might have oceans beneath their icy surfaces, which could support life. Moons
can affect their planets in many ways, such as causing tides in the oceans. They also help us learn more
about the universe and how space objects interact. By studying moons, scientists gain valuable clues
about the history and formation of planets. Understanding these space objects expands our knowledge of
space and its many mysteries. 【題組】31. What is the primary focus of the article?
(A) Describing the solar system
(B) Discussing Earth's closest neighbors
(C) Explaining natural satellites
(D) Providing details about planets