单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just beard.

A．To make them aware of its harmfulness.
B．To play games with them.
C．To send them to the hospital.
D．To help solve their psychological problems.

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单项选择题

单项选择题

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