You will hear five persons talking about different things. Decide the subject of their talk by the speaker. Write one letter(

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问题    You will hear five persons talking about different things. Decide the subject of their talk by the speaker.
   Write one letter(A-H)next to the number of the recording.
   Do not use any letter more than once.
   After you have listened once, replay each recording.
   You have 15 seconds to read the list of reasons A-H
A. fitness
B. oil pollution
C. advertisement
D. census
E. laboratory work
F. sports
G. transportation system
H. fashion model
  
It showed a population of 1,008,175,288,or one-quarter of the human race.There was a nineteen-point questionnaire to complete,and with the help of twenty-nine computers the information was broken into categories such as age,occupation and marital status.
A kind of oil-eating bacteria has been developed in the laboratories.They are sprayed from a plane in a sort of powder form and then,when they fall on the water,they begin to breed and multiply.Their energy,you see, comes from oil.

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答案B

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