阅读理解。 What would life be like if you lived on Mars (火星)? Would you be very thirsty because there is so little water? Would you have strange neighbors? We could ask the boy called Davey Martin for answers. His family moved from their nice Earth home to a place on Mars. 'His life must be very exciting!' you may say. But Martin doesn't agree. There Is Nothing to Do on Mars is a book written by a US writer, Chris Gall. It tells of Martin's experience on the red planet. Martin moves around on a flying scooter (踏板车).  He builds a fort (堡垒) and looks for real Martians with his robot dog, Polaris. He does that every day. 'I am bored!' says Martin. But when Polaris' nose leads to a great discovery, Martin's world changes. He digs a hole and finds water.  It means there is a real ocean under the ground. Martin becomes a hero. We may never have the chance to live on Mars, but we are like Martin sometimes. We often complain, 'I am bored!' or 'There is nothing to do ! ' The book may have a deeper lesson about life. If you're creative and search carefully, you'll be surprised by what you find! 1. Who is Davey Martin? A. A boy whose family moved to Mars. B. A robot dog. C. A US writer. D. The writer of the book There Is Nothing to Do on Mars. 2. What does Davey Martin think of his life on Mars at first? A. Exciting. B. Boring, C. Terrible. D. erous. 3. How does Davey Martin move around on Mars? A.  By bike. B.  By car. C. On a flying scooter. D. By spaceship. 4. Why does Martin become a hero? A. He is brave enough to dig a hole on Mars. B. He makes an ocean under the ground on Mars. C. He builds a fort and changes the life on Mars. D. He discovers a real ocean under the ground on Mars. 5. Why do you think the writer wrote this passage? A. To tell us the life on Mars. B. To introduce a hero to us. C. To encourage us to go to Mars. D. To encourage us to be creative.