问题补充：
American schools are quite different from those in China. In America, at the beginning of the term, students must select their courses and teachers first. While in China students usually have no chances to select their courses and teachers.
Selecting is very important for your grades in America. So at the first term, don’t select too many courses, 74.or you’ll feel very nervous and it may influence your study. Then you have to ask for some teaching plans. There is some information about subjects, time arranging, marks and textbooks. At the same time, you must choose the teachers. Different teachers have different teaching methods. If the teacher is called “killer” by the last grade, many students will give up choosing him. Because this kind of teacher will leave too much homework, too many exams and give too low grades.
There is another thing after you select the course and the teacher. How to buy textbooks makes each student feel hard. The textbooks in America are very expensive. Each copy is about $30～50. In order to save money, many students buy some used textbooks, and some students usually borrow textbooks from the school library. You must get enough ready before class. In class, discussing is very important. 75. 老师鼓励你提出问题或展示你自己的观点。They don’t usually ask you to sit well. Instead they allow you to sit or stand everywhere you like. They don’t give you much homework to do. You can learn some knowledge and do exercises by yourself. So in American schools, you must do almost all things yourself.
根据文章内容，补全71、72句中所缺单词、短语或句子。
【小题1】 At the beginning of the new term, American students have to ask for some teaching plans and get their textbooks ready besides .
【小题2】 The teacherwill always leave too much homework, too many exams and give too low grades.
【小题3】 根据文章内容回答问题。
Why do many students in America buy used textbooks ?
【小题4】 请将文中黑体字译成汉语。
【小题5】 请将划线句子译成英语。selecting(their/the)course(s)and(the)teacher(s).
答案：
(答案→)selecting(their/the)course(s)and(the)teacher(s).
解析：【主旨大意】文章介绍了美国学校教育与中国的不同之处：学期初学生们可以自由选择课程和教师，而中国的学生却不能。另外美国的学生经常使用二手教科书或从图书馆里借书，
【小题1】由文章第一段可以看出美国的学生可以自由选择科目和教师，而教学计划必须向老师索取，书籍必须自备。
【小题1】文章第二段后边的两句话“If the teacher is called “killer” by the last grade,…Because this kind of teacher will leave too much homework, too many exams and give too low grades.”可以看出那些留作业多的老师被称作“杀手(killer)”。
【小题1】由文章的第三段第三句话“The textbooks in America are very expensive.”可以看出学生们买二手书是“因为在美国教科书太贵了”
【小题1】feel是系动词，feel nervous意为“感到紧张”， 动词influence，意为“影响”；
【小题1】encourage sb. to do sth.意为“鼓励某人干某事”；show sth.意为“展示……”；这是由or连接的并列句。
