单项选择题

Questions 26 to 28 are based on the passage you have just heard.

A. When he is pleased.
B. When he grows up.
C. When he gets angry.
D. When he hears other baby crying.

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单项选择题

A. 800 years.
B. 400 years.
C. 550 years.
D. 2,000 years.

单项选择题

A. 80 million.
B. 70 million.
C. More than 3,500 million.
D. About 3,000 million.

Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。