阅读理解，阅读下列内容，从每小题所给的四个选项中选出一个最佳答案。

　　If you are a visitor, you may look for the post office in a foreign country．Can you imagine how those people will tell you the way?

　　In the countryside of American Middle West, people will tell you, “Go north three miles．Turn east, and then go another two miles．”

　　While in Los Angeles, California, the American people have no idea of the distance on the map．“How far is the post office? ” you ask．“Oh, ”they answer, “it is about ten minutes by taxi from here．” But in fact, they don't know how far it is．

　　In Greece(希腊), a Greek will often say, “Follow me．”Then he'll go with you through the streets of the city to the post office．

　　In many places, people usually say “Sorry, I don't know” when they can't tell you the way．However, in Mexico(墨西哥), the people think “I don t know”is not polite．They usually give an answer, often a wrong one．

　　So you must be careful of their habits when you are asking the way in a foreign country．

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