单项选择题

What is the talk mainly about

A．The 23rd Olympic games.
B．Los Angeles hosting the Olympics.
C．Using computers before and during the 23rd Olympics.
D．A sophisticated computer.
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单项选择题
What did the electronic message system do
A．It trained American athletes.
B．It helped keep the journalists informed of the results.
C．It kept track of schedules.
D．It made the judges' decisions final.
单项选择题
what will the teller of a humorous story do when he tells his story
A．He laughs at his own joke.
B．He repeats it several times.
C．He is very serious when he tells it.
D．He is concerned about the reaction of his listeners.
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