A professor from New York University once went to a remote area to do some science research. One
day, he ate something wrong and became sick, but it was too far to go back to the city. "I have to see a
doctor." he said to a local. "How can I be sure of getting a good one?"
      "It's easy," was the reply, "Every time a doctor loses a patient, it's our law that he must fly a balloon
above his office."
     So he began his search. One doctor flew 20 balloons, another 30. Then the professor found an office
that was flying only five, and went in.
     "You have to wait. I've been very busy," the young doctor told him. "I started my business only
yesterday." 

1. The professor was from _____.

A. Australia
B. Britain
C. Japan
D. America

2. The word "remote" in the first sentence means _____. 

A. 遙遠(yuǎn)的
B. 繁華的
C. 附近的
D. 城市的

3. He wanted to find a doctor because _____.

A. he wanted to do science research
B. he wanted to fly a balloon
C. he wanted to speak to a local
D. he became sick

4. The young doctor was the doctor the professor found _____.

A. first
B. second
C. third
D. fourth