单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Give a speech.
B．Meet His lawyer.
C．Attend a conference.
D．Make a business trip.
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单项选择题
A．To examine the chemical elements in the Ice Age.B．To look into the pattern of solar wind activity.C．To analyze the composition of different trees.D．To find out the origin of carbon-14 on Earth.
A．To examine the chemical elements in the Ice Age.
B．To look into the pattern of solar wind activity.
C．To analyze the composition of different trees.
D．To find out the origin of carbon-14 on Earth.
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