Passage One Questions 26 to 28 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.

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.