阅读短文，按要求完成短文后的各项任务。
The relationship between student and teacher is less formal (正式的) in the U.S. than in many other
countries, especially at the college level. (1)当老师走进教室时, 学生不必起立. Students are generally
encouraged to ask questions during class, to go to the teacher's office for help after class, and to phone
if they can't go to school and need help with their lessons. (2)Most teachers allow students to enter class
late or leave early, if necessary.
(3)However, students are still asked to be ________ to their teacher and classmates and to be ________
during a test. When students want to ask questions, they usually put up a hand and wait. When the teacher
or a student is speaking to the class, it's rude to talk to another classmate, even in a low voice. When a test
is being given, talking to a classmate is not only rude but also wrong. In the eyes of most American teachers,
students who are talking to each other during a test are cheating (作弊).
1. 将（1）句译成英文：
2. 将（2）句译成中文：
3. 在（3）句的空白处分别填入一个适当的词使句意完整、上下文通顺：
4. 在文中画出与下面句子意思相近的句子，并在该句句首标上序号。
Most teachers think it is dishonest for students to talk about something when they are having a test.
5. 在文中画出或写出最能表达该短文主题的句子：