题目

Below is a page from The World Almanac（年鉴）and Book of Facts 2008.   46. Which park has 365 miles of explored underground passages?        A. Arches, UT       .                                  B. Cuyahoga Valley, OH.        C. Acadia, ME.                                 D. Mammoth Cave, KY. 47. In which year was Channel Islands first authorized as a protection site for sea lions, sea birds and unique plants?        A. 1929.               B. 1938.               C. 1978.               D. 1980. 48. The world’s tallest trees are found in _______.        A. Redwood, CA                              B. Gates of the Arctic, AK        C. Canyonlands, UT                        D. Kings Canyon, CA 49. In 1917, the national park Denali was named as _______.        A. Black Canyon of the Gunnison           B. Mount Desert Isl.        C. Mt. McKinley National Park          D. Rocky Mountain 答案：ADCDB

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