阅读下面短文，根据上下文和所给单词首字母，写出标有题号的每小题空白处适当单词的完全
正确形式。
Class 5 was the worst class in Hill Valley Hight School. The students were badly behaved and had no
(1) i______ in their lessons. When a new headmaster came to work at the school, he decided to do
(2)s______about Class 5. On the second day of school, he left his (3)o______ and walked to Class5's room.
He did not have to know (4)w______ it was. He could heard the noise from it. He stood outside the classroom
for a few moments and looked (5)i______ through the window. Some boys were fighting. Other students
were throwing things at one (6)a______. (7)N______ was doing any work.
The headmaster had experienced in badly behaved classes before. He (8)k______ what to do. He would go
into the classroom, take hold of the biggest boy in the class and (9)p______ him.This would be an (10)e______
to the others. He took a (11)d______ breath and opened the classroom door.
The students paid no attention to him. "Silence" he shouted at the top of his (12)v______. This time the
students (13)s______ what they were doing and looked at him. Quickly he walked up to the oldest-looking
boy in the room. He was also the noisiest and had been (14)s______ at the top of his voice. He took hold of
him by ear and pulled him to the (15)f ______ of the class.
"I'am going to punish you as an example to the others", he said."Now go to my office and (16)w______
for me." Then he (17)t______ to the class and told them about what they should do in (18)s______. When he
finished, he said,"Does anyone have any (19)q______?" One of the students put up her hand and said, "Yes, sir,
I have. When can we have our teacher (20)b______?"