单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．The cultural heritage of Americans.
B．How to deal with Americans.
C．How to do business with Americans.
D．How to travel to America.
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单项选择题
What is the possible meaning of guilty pleasure (Line 1, Para. 1)
A．Illegal activities.
B．Shameful activities.
C．Disgusting activities.
D．Secret activities.
单项选择题
A．The workers on the platforms were replaced by machines.B．It became the first completely automatic railway in the world.C．A completely automatic line was added to its network.D．Its trains became computer controlled.
A．The workers on the platforms were replaced by machines.
B．It became the first completely automatic railway in the world.
C．A completely automatic line was added to its network.
D．Its trains became computer controlled.
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