单选题 The United States 1 a large part of the North American continent. Its neighbors are Canada 2 . the north, and Mexico to the south. 3 the United States is a big country, it"s not the largest in the world. In 1964 its population was over 185,000,000.
When this land first became a nation, after winning independence from England, it had thirteen states, 4 of the states was represented on the American flag by a star. All the states were in the eastern part of the continent. As the nation grew towards the west, new states were in the eastern part of the continent. As the nation grew towards the west, new states were added and new stars 5 on the flag. For a long time, there were 48 states. In 1959, however, two more stars were added to the flag 6 the new states of Alaska and Hawaii.
Sometimes 7 is said that the Indians are the only real Americans. Most Americans, however, are descendants(后代) of people who came from all over the world to find a new 8 in a new land. 9 who came first and in greatest numbers to make their home on the eastern coast of North America were mostly from England. It is for that reason that the language of the United States is English and that its culture and customs are more like 10 of England than of any other country in the world.

【正确答案】 A

【答案解析】[解析] 表示两个地区的位置有三个介词：in, to, on。in表示两者存在所属或包含的关系(如台湾和中国的关系)，to表示两地相邻但不接壤(如中国和日本的关系)，on表示相邻且接壤(如中国和越南的关系)。因选项中没有on，就只能选to，表相邻。

【正确答案】 A

【答案解析】[解析] “美国是个大国”与“它不是世界上最大的国家”两个分句问很显然是转折的关系，所以应选although，只有它表转折。now that=since“现在，既然”，表原因。

【正确答案】 C

【答案解析】[解析] 本句意思是美国独立后有13个州，每个州都在美国国旗上有所表现。谓语动词是was，意味着主语是单数，这样排除了an和some。而every一般不与of连用，所以只能选each。

【正确答案】 C

【答案解析】[解析] 本句意思是更多的美国人都是那些来自于世界各地、来新大陆寻找新生活的人的后代。work不可数，不能由a修饰，而世界各地的人是不可能到新大陆寻找星星的，所以无论从语法上，还是从含义上都应选C。