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

A．Because it can send email.
B．Because it offers online discussion.
C．Because it is visible and audible.
D．Because it provides chatting servic

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Chad Reissig’s team pursued the research of energy drink due to ______.

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。