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One day a dentist was starting his morning work. Suddenly a man ran into his room. His face was red and he could only say "Quick! Quick!"
The dentist thought he must be very ill. His assistant(助手)helped make the poor man sit in a chair. The dentist gave the man some medicine to make him sleep. Then he looked into the man's mouth and pulled out the bad teeth. As soon as the man woke up, he said, "Quick, doctor, quick!" in a low voice.
"It's all right now," the dentist told him." "It's over." " You don't understand," said the man. "I came to tell you that your house is on fire."
B. 
C. 
D. 
E. 
B. 
C. 
D. 
E. 