完形填空。 The summer vacation is the best part of the year 1 most American children. The 2 is usually good, so they can have a good time outdoors. If one lives in the countryside, he or she may have fun 3 in the woods or fields. If one lives in a big 4 , he or she likes to go to a park to play. Tom, 5 American boy, enjoys 6 very much.  He 7 travels in his country.  This 8 he wants to d0 9 . He is interested in Chinese history. 10 he is going to Beijing and Xi'an by plane. He is leaying 11 the 15th of July and getting 12 to New York on the last day of the month. He plans 13 a fantastic vacation. 14 the days, he is visiting places of interest and going shopping. At 15 , he is taking walks to enjoy night views. He's sure he'll have a wonderful vacation. (     )1. A. at (     )2. A. weather (     )3. A. to play (     )4. A. lake (     )5. A. a (     )6. A. travel (     )7. A. always (     )8. A. winter (     )9. A. something different (     )10. A. Because (     )11. A. in (     )12. A. out (     )13. A. have (     )14. A. During (     )15. A. morning B.in B. people B. playing B. place B. an B. travels B. hardly B. summer B. different something B. If B. on B. into B. to have B. At B. afternoon C. for C. food C. played C. city C. the C. travelled C. never C. autumn C. anything different C. So C. at C. off C. having C. On C. night D. on D. beach D. play D. street D. / D. traveling D. not D. spring D. different anything D. But D. to D. back D. had D. With D. day