Just as the teacher was coming into the classroom，one of the boys，Bill，said loudly， "The teacher is a real fool．"
   To their surprise，the teacher pretended not to have heard this．He paid no attention to anyone and said nothing．He just went up to the teacher's desk and began the class．He said， "Today we are going to study punctuation （標(biāo)點(diǎn)符號(hào)）．Punctuation in sentences is very important．Look at the sentence，please，boys and girls．"
   He picked up a piece of chalk and wrote the following sentence on the blackboard：Bill says the teacher is a real fool．
   The class laughed at once．
   "Now，" the teacher went on， " with two commas I can change the meaning of the sentence and it reads：Bill，says the teacher，is a real fool．"

（1）What happened at the beginning of the class？

C

C

A．One of the boys made much noise．
B．One of the boys told the class why their teacher was a fool．
C．One of the boys said something bad about the teacher．
D．One of the boys was fooled by the teacher．
（2）To their surprise，

D

D

．
A．the students paid no attention to the teacher．
B．The teacher went up to the teacher's desk angrily．
C．The teacher began the class with a strange sentence．
D．The teacher seemed not to have heard it．
（3）What did the teacher teach in class？

B

B

A．He asked a student to read a sentence．
B．He told the students that punctuation was very important to a sentence．
C．He told the students not to be a fool．
D．He asked the students to change a sentence．
（4）How did the teacher change the meaning of the sentence？

C

C

A．He wrote it on the blackboard．
B．He read the sentence again and again．
C．He put in two commas in the sentence．
D．He explained the sentence twice．
（5）From the story we can learn

A

A

．
A．It's very important to use punctuation correctly．
B．The teacher must be strict in his work．
C．The teacher is a foolish man．
D．The teacher was satisfied with what Bill had said．