单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A. Because he has a big brain.
B. Because he learns to speak.
C. Because he develops civilization.
D. Because he knows many words.

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单项选择题

Passage Two Questions 30 to 32 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。