单项选择题

Questions 11-18 are based on the conversation you have just heard.

A．The meeting is going on in Room 241.
B．The meeting is cancelled.
C．The meeting is about space technology.
D．The meeting is held in the conference room.

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单项选择题

A．One to three million years ago.B．Two to three million years ago.C．One to three billion years ago.D．Two to three billion years ago.

A．One to three million years ago.
B．Two to three million years ago.
C．One to three billion years ago.
D．Two to three billion years ago.

填空题

Questions 11-18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 11-18 are based on the conversation you have just heard.