The year at an American college is divided into 2 semesters (学期，半学年) or 3 quarters (学期，每学年分3学期制度中的一学期). A semester includes 15 weeks; a quarter includes 10 weeks. American college students usually go to school from September to May. They can also study during the summer.
Students choose their classes a few weeks before the start of each term. Universities offer a great many classes in the students" main area of study and in other areas as well. Students must take both. These include science, maths, computer, history and English. Other classes may be just for fun, like dance, theatre (戏剧) or sports. Tests are usually given in the middle of the term and at the end of it. The final exam is extremely important. In some classes, the professor asks the students to write a research paper (研究论文) or to complete a certain task instead of taking a test.
Classes at an American college are usually organized through lectures. For example, a student may attend 2 or 3 lectures a week by the professor. As many as several hundred students sit at each lecture.I believe that we get 1 knowledge outside the classroom than we do inside. Suppose there were two children, the first limited to getting his knowledge entirely from the 2 , the 3 one able to get information from 4 source except the classroom. 5 would learn more Most likely the second one 6 he would learn from his environment, from his parents, from the books he read, from TV, and from study by 7 . So the greatest source of useful, practical knowledge comes from 8 school. 9 we get in a classroom is 10 a small part of that total.
情景：
你的表妹Ann很快就要参加中考。
任务：
请你用英语写一封50个词左右的信鼓励她从容面对考试。内容包括：
●不要过分担心考试，没有人能熟悉所有的知识；
●要自信，不要紧张。