I have a special rule for travel: never carry a map. Sometimes I get lost, but I usually have a good time. I can practice a new language, meet new people, and learn new customs. And I find out about different “styles” of directions every time I ask, “ How can I get to the post office?”
In Japan, most streets don’t have names; people use landmarks in their  directions. For example, the Japanese will say to the travelers “Go straight down to the corner. Turn left at the big hotel and go past a market. The post office is across from the bus stop.”
In the countryside of the American Midwest, there are not mountains, so the land is very flat (平的)，in many places there are no towns or buildings within miles. Instead of landmarks, people will tell you directions and distances. For example, they will say: “Go north two miles. Turn east, and then go another mile.”
People in Los Angeles, California, measure distance in time, not miles. “How far away is the post office?” you ask. “Oh”, they answer, “It’s about five minutes from here.” They don’t know how many miles away it is.
People in Greece sometimes do not even try to give directions because tourists seldom understand the Greek language. Instead, a Greek will often say, “Follow me.” Then he’ll lead you through the streets of the city to the post office.
66. The underlined word landmarks in the second paragraph means ____.
A. easily recognizable (可辨认的) objects by which one can tell one’s position
B. big markets where people can tell you how to get to the post office
C. tall buildings in front of which is the post office
D. bus stops which are near the post office you are looking for
67. From the passage we learn that in the American Midwest countryside, ____.
A. there are no buildings                           B. there are no landmarks
C. the fields are very flat                          D. there are some hills
68. Which of the following shows distance in time?
A. The Japanese.                                 B. People in Los Angeles.
C. People in Greece.                              D. People in the American Midwest.
69. Why don’t the Greeks try to give directions?
A. Because they often say “Follow me.”
B. Because they will lead you to the post office.
C. Because they don’t understand any foreign language.
D. Because tourists don’t understand their language.
70. The passage tells us that ____.
A. there are different ways to get to the post office
B. people everywhere can tell you how far the post office is
C. in Greece there is much trouble in finding the post office
D. there are different customs in different places