题目内容：
阅读材料，回答题。The United States ___ 51 ___a large part of the North American continent. Its neighbors are Canada ___ 52 ___ the north, and Mexico to the south.___ 53 ___ the United States is a big country, it' s not the largest in the world. In 1964 its population was over 160,000,000.
When this land first became a nation, after winning independence from England, it had thirteen states,___ 54 ___ 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 ___ 55 ___ on the flag. For a long time, there were 48 states. In 1959, however, two more stars were added to the flag ___ 56 ___ the new states of Alaska and Hawaii.
Sometimes ___ 57 ___ 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 ___ 58 ___ in a new land. ___ 59 ___ 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___ 60 ___of England than of any other
country in the world.
_________ A．does
B．makes
C．covers
D．gives
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