单项选择题

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

A．Call on people to protect sharks.
B．Point out the living environment of sharks.
C．Explain why the sharks are dangerous.
D．An introduction to sharks.

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单项选择题

A．Separate houses were built for storing ice.B．Double walls were built in icehouses to keep cool.C．Blocks of ice were packed with hay in icehouses.D．Ice was put into icehouses in winter.

A．Separate houses were built for storing ice.
B．Double walls were built in icehouses to keep cool.
C．Blocks of ice were packed with hay in icehouses.
D．Ice was put into icehouses in winter.

Passage One Questions 26 to 29 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

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