单项选择题

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

A．Where UFOs came.
B．The Heaven.
C．The river of Heaven.
D．Light in the sky.

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单项选择题

填空题

Some thriving institutions are also threatened because of ______ .

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