根据短文内容选择最佳答案。(Choose the best answers according to the passage．)

　　To study all the way to a 12th“grade”might sound strange to you．But not to an American student．

　　Most Americans have six years of primary school and six years of secondary school．Each year is called a grade．At about age six, American children start six years of primary school．During those six years, the children learn to read and write and do easy maths．They also learn history, science, health and P．E．Students in grades one through six usually only have one teacher for each year．They stay in the same classroom with the same students for all of their different subjects．

　　Secondary school has two parts：junior high school(sometimes called middle school)and senior high school．In the seventh grade, students begin to learn more subjects．They usually have between six and eight different classes every day．Each class has different students, and each one is taught by a different teacher．

　　Students have even more freedom in senior high school．Most students begin to study a foreign language like Latin, Spanish or French．There are also classes in business, computers and also courses like auto mechanics and farming．Besides their required classes, students can also choose a few classes that they're interested in, like art, singing and woodworking．

　　In most places in the US, students can drop out of school at age 16, but most kids choose to stay．After students finish school, they can choose to start working, go to school for two years to learn a profession, or go to college．

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根据短文内容选择最佳答案。

　　The British are known as people who love to stand in line, but a new research(调查)shows that the British are only about average at waiting politely in a queue．The French are the best．It's the Germans who don't have a good habit(习惯)of standing in line．They can't stand to wait for anything．They begin to shout loudly and noisily if the line doesn't seem to be moving fast enough．Sadly it never moves fast enough for them．

　　The experts studied 940 people across Europe．They watched secretly as they waited in line－to get tickets, to order fast food and to wait for the bus．They found people who are good at forming(排成)queues feel that they move along faster．For example, in Britain, the average waiting at a queue needs about three and a half minutes．In Germany or Sweden people hate waiting in line．In fact, people spend double the time as the British in queues．They get to the front of the queue without thinking about others, so they waste others' time．

　　The expert who did the research had asked a person to break into a queue to see what people would do．In Britain, people shouted loudly at him, but when he said,“I am terribly sorry．I didn't realize there was a queue．Do go before me．”People smiled and said,“oh, that's all right, one more won't matter much．”It was also found in France, where 80％of the people didn't mind standing in line, only if they were treated politely．While in Germany everyone was angry and wore an unhappy face．The expert said,“If only they could learn from the British and the French to think of queuing as an exercise in making the best of an unhappy thing, they might find that the queue then moves faster．”

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