Passage 3 Questions 1 to 5 are based on the following passage. I was starting my evening stretch when I saw the most elusive ( 难捉摸的 ) creature in the Arctic: a wolverine ( 狼獾 ). He was between the sand and the beach, running up the little hill. I stayed still and watched him. When he was out of sight, I quickly grabbed the camera and ran. Chasing a wolverine across tundra ( 冻土地带 ) is probably not the wisest decision I've ever made. But a chance like this will not happen again. I ran for about a mile and happily realized that I wasn't looking down at each tussock ( 草丛 ). I was running like the caribou ( 北美产驯鹿 )! A beautiful feeling. Then I saw him, still running. I had guessed that he would stay near the coast, and there he was. I was still far away, and he didn't see me. He kept running, and I followed. But he went down a hill and out of sight. That's bad news. If I get too close before we each see each other, he might attack. Wolverines are by far the most aggressive animals here. They kill, among other animals, young caribou. Should I stop? No, but I moved ahead cautiously. I approached the hill and saw no wolverine. I turned behind me to find another route he might have taken. And there, loping across the tundra, not too far off was ... there she was! It was a mother wolverine with two nearly full-grown cubs ( 幼兽 ). Now I really knew to keep my distance. They hadn't seen me, and I followed. The cubs were playing, rolling over each other, but all three kept moving south at a fast pace. I was barely able to keep up with them as I took a few photos. I was gaining ground , though, and the mother ually saw me. She continued running, the cubs playing and following, but the mom stopped every 30 seconds to track my progress. When I realized I was disturbing her, I stopped and watched them fade across the tundra toward the hills. I walked back to camp - glad that I hadn’t pushed her much. 1. Why did the author chase the wolverine?