本文讲述美国黄石公园是大自然的杰作，分别介绍了定时喷泉，公园小径、大峡谷，树木打造的酒店，并期待秋冬季节再来黄石公园。
    If Mother Nature were an artist, then one of her greatest masterpieces(杰作)would be Yellow-stone National Park.I recently___1___the park for the first time. I always looked forward to spending some time in the great outdoors, and this park seemed like the ___2____choice.
   Yellowstone has around 500 geysers(间歇泉）,and the most___3___one is Old Faithful. I saw the boiling water shoot up from the ground into the___4___This happens without fail every 90 minutes or so. It's the third largest hot spring(温泉）in the world.___5____what makes it special isn't its size; rather, it's the rainbow (彩虹）of colors around its pool of blue water.___6___ in the world can compare with it.
   Next,I went for a ___7___ along a footpath that brought me to some wonderful views(风景)of Yellowstone's Grand Canyon(峡谷).The ___8___ views of its huge rock walls and winding rivers took my breath away. I was also excited about seeing some of the animals that ___9___ in Yellowstone, so I went to Hayden Valley, which is a good place for___10___ wildlife.
   After a long day of touring,I headed to my ___11___ to get some rest. Yellowstone is very tourist-friendly, with several hotels to choose from.The one I ___12___ Old Faithful Inn. Over a hundred years old.this hotel is built from wood and offers ___13___ rooms.The park also has many open places where people can go ___14___ under the stars.
   After spending a weekend at Yellowstone.I knew that I would ___15___one day. Maybe I'll come in fall or winter next time so that I can see different shades of this masterpiece of nature.
1. A. visited         B. watched      C.checked        D. discovered
2. A. perfect        B. cheap           C.free               D. difficult
3. A. expensive   B.common       C.famous        D. convenient
4. A. mountain    B. sky                C. floor             D. pool
5.A.but                 B. and                C. or                 D.so
6.A. Something   B. Anything      C.Everything    D. Nothing
7. A. ride               B. drive             C.walk              D.fly
8. A. boring          B.worrying       C. amazing       D.tiring
9. A. hide              B.live                C. work             D. fight
10.A.killing           B. buying         C.helping          D. watching
11. A. restaurant B. hotel            C.school           D store
12. A. refused       B. followed     C. accepted     D. chose
13. A. comfortable B.strange     C.terrible           D. empty
14.A.fishing           B. swimming C. camping       D. parkíng
15. A. leave            B. return         C.miss              D. lose