单项选择题


Passage One
Questions 26 to 29 are based on the passage you have just heard.

A．Putting a roof on a barn.
B．Harvesting water reeds.
C．Using stone as a building material.
D．Daily farm operations.
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单项选择题
A．Mating habits of squid and octopus.B．The evolution of certain form of sea life.C．The study of marine shells.D．Survival skills of sea creatures.
A．Mating habits of squid and octopus.
B．The evolution of certain form of sea life.
C．The study of marine shells.
D．Survival skills of sea creatures.
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