单项选择题


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

A．Steel cables.
B．An open carriage.
C．Guide rails.
D．Strong ropes.
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单项选择题
A．50 years.B．100 years.C．200 years.D．300 years.
A．50 years.
B．100 years.
C．200 years.
D．300 years.
单项选择题
A．As unusually good.B．As quite ordinary.C．As not very good.D．As unsatisfactory.
A．As unusually good.
B．As quite ordinary.
C．As not very good.
D．As unsatisfactory.
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