〔2019高考江蘇卷試題第一段〕 In the 1960s, while studying the volcanic history of Yellowstone National Park, Bob Christiansen became puzzled about something that, oddly, had not troubled anyone before: he couldn't find the park's volcano. It had been known for a long time that Yellowstone was volcanic in nature-that's what accounted for all its hot springs and other steamy features. But Christiansen couldn't find the Yellowstone volcano anywhere.
1. What puzzled Christiansen when he was studying Yellowstone? A. Its complicated geographical features. B. Its ever-lasting influence on tourism. C. The mysterious history of the park. D. The exact location of the volcano. 【D】
While studying the volcanic history of Yellowstone National Park, Bob Christiansen became puzzled. It had been known for a long time that the park was volcanic in nature, but he couldn't find the volcano.
1. What puzzled Christiansen when he was studying Yellowstone? A. The mysterious history of the park. B. The exact location of the volcano. 【B】