阅读理解 It is often difficult for visitors to understand Americans lack of desire for privacy(隐私) . They are not a nation of walled gardens and closed gates. Their yards normally run into one another without fences, they often visit one another's homes without being invited or telephoning first, they leave their office doors open while they work. Their lack of desire for privacy probable results from their history as a nation. America is a big country.   There have never been walled cities in the United States, nor was there the need for Americans to protect themselves from neighboring states. During the early years, America had so few settlers that neighbors were very important, they were not to be shut out by doors and fences. Neighbors offered protection and helped in the hard work of settling the la nd. They depended upon each other. From the nation's early history has come the desire for openness rather than privacy. Visitors will notice this desire in a number of small ways, there may be rooms in American homes that do not have doors or that have glass walls. If you notice that people forget to close your door when they leave your room, do not think that this is rude, help them to learn that you would like it to be closed, or else become used to new ways. In either case, be patient with the differences. 1. Accor ding to the passage, visitors to America sometimes have difficulty understanding ___. A. Americans' openness B. American's lack of desire for privacy C. Americans' way of home D. American's style of life 2. During the early years, people were never shut out by doors because ___ . A. they were neighbors B. they were friends C. they depended on each other D. they got used to that 3. Visitors will notice American's desire for openness in a way ___ A. they walled their houses with glass B. they leave the office doors open while working C. they never have fence D. they depended upon each other 4. Which of the following is the best title for the passage? A. No Walled Cities. B. The Early Settlers C. Americans' Lack of Desire for Privacy D. be Patient with Differences