2. A. win　　　　 B. won　　　　　 C. winning　　 D. have won

1. A. America B. America's　 C. American　 D. Americans

15. C。learn 有“了解、学会”等意思。

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The United States covers a large part of the North 　1__ 　continent (洲), when this land first became a nation. After 　2　 　　　 its freedom (自由) from England, it has 13 states. Each of the states had a star on the American flag (旗子). As the nation 　3　 , new states were formed and there 　4　 　new stars on the flag. 　5　 　a long time, there were forty-eight states. In 1959 two 　6　 　stars were added (加) to the flag, standing for (代表) the new states of Alaska and Hawaii.

　 7　 　were the first people of the land and great number of people came from England. It is 　8　 　　 that reason that the language of the U.S. is English and 　9　 　its culture and customs (文化习惯) are more 　10　 those of England than any other country in the world.　

14. C。猩猩经过训练，知道睡前要关电视。

13. D。要让猩猩适应住在有家俱的房子里，必须训练一段时间。从时间段来，用 “day”好。

12. A。下文提到的都是有关猩猩生活方面的情况，故选live.。

11. A。猩猩准备用棒子敲一下食物。

10. B。从前句推知，猩猩爬到箱子上。

9. B。 为了够到东西，猩猩要站到上面。

8. D。reach　 有“够到”、“到达”的意思。