单项选择题

Questions 29 to 32 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．13%B．16%C．14%D．15%

A．13%
B．16%
C．14%
D．15%

单项选择题

A．doctor and nurse.B．Librarian and library patron.C．Forest ranger and hiker.D．Nurse and patient.

A．doctor and nurse.
B．Librarian and library patron.
C．Forest ranger and hiker.
D．Nurse and patient.

Questions 29 to 32 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 29 to 32 are based on the passage you have just heard.