单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Their surface features.
B．Their chemical composition.
C．Their temperature.
D．Their age.

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单项选择题A．Nothing.B．A lot.C．Hardly anything.D．a little.

单项选择题A．English.B．Canadian.C．Australian.D．Austrian.

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