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．Critical.B．Serious.C．Skeptical.D．Casual.
A．Critical.
B．Serious.
C．Skeptical.
D．Casual.
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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