单项选择题

　　Passage two 　　Questions 31 to 33 are based on the passage you have just heard.
（）

A．It will become popular gradually.
B．It will change the concept of food.
C．It has attracted worldwide attention.
D．It can help solve global flood crises.

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单项选择题（）

A．He has better memories of childhood.
B．He was accused of family violence.
C． He is a habitual criminal.
D． He was wrongly imprisoned.

单项选择题（）

A．To test how responsive dolphins are to various signals.
B．To find out if the female dolphin is cleverer than the male one.
C．To see if dolphins can learn to communicate with each other.
D．To examine how long it takes dolphins to acquire a skill.

Passage two Questions 31 to 33 are based on the passage you have just heard. （）

　　Passage two 　　Questions 31 to 33 are based on the passage you have just heard.
（）