单项选择题

A．People considered them essential.
B．They were common in the United States, but not in Europe.
C．Only a few people had them.
D．They were actually not very accurate.
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单项选择题
A．In San Francisco.B．In Washington.C．In Chicago.D．In New York.
A．In San Francisco.
B．In Washington.
C．In Chicago.
D．In New York.
单项选择题
A．Give a speech.B．Meet His lawyer.C．Attend a conference.D．Make a business trip.
A．Give a speech.
B．Meet His lawyer.
C．Attend a conference.
D．Make a business trip.
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